About 18 months ago, the giant PC maker brought out an unusual desktop computer called the TouchSmart, a bulky model meant for kitchen counters. It was intended as a walk-up home kiosk, with large icons you could activate by merely touching them to check the weather or to consult your calendar.

This TouchSmart was praised for its originality, but it wasn’t as practical as promised, and wasn’t a big hit. Still, H-P is persevering with the concept. It has refined the hardware and the touch-controlled software, and has come up with a new line set to go on sale by mid-July.

This new TouchSmart, which comes in two models priced at $1,299 and $1,499, is a relatively slim, one-piece desktop with a large 22-inch screen. It resembles the Apple iMac or the Dell XPS One and, like the latter, runs Microsoft’s Windows Vista. It has a wireless keyboard and mouse, and can be used as a normal Vista computer.

But, like the first TouchSmart, this new model comes with H-P’s touch-controlled user interface and special programs designed to be manipulated with your fingers. For this model, H-P is de-emphasizing the idea that the machine is meant for the kitchen, but it is forging ahead strongly with the notion that touch control is the wave of the future.

After testing the new TouchSmart PC for a few days, my verdict is mixed. The TouchSmart software is indeed improved. It’s attractive, more versatile and more practical — and fun to use. The hardware is handsome and well-equipped. And H-P deserves credit for continuing to build software expertise in a world where makers of computers and cellphones must become as expert at software as they are at hardware. But the latest effort has some problems.

The TouchSmart interface is inviting. There’s a top row with huge icons, called tiles, displaying your favorite programs, and a bottom row of smaller tiles for other programs. You can scroll each row with a finger and decide which programs go in which row. You can even include in either row not only TouchSmart programs, but the regular Windows programs or Web sites that you like. When you tap on a tile that isn’t for a special TouchSmart program, the computer pops you into the regular Windows interface. To return to the TouchSmart interface, you just tap a home button below the screen.

Hewlett-Packard’s TouchSmart

The TouchSmart software includes a calendar, a weather widget, a clock, music and video players, a program for composing short notes, and even a basic Web browser. All worked OK in my tests, but they’re simple and limited.

The computer itself is fairly powerful. Both models have dual-core processors, large hard disks, and a whopping 4 gigabytes of memory. And both run the special 64-bit version of Vista, which allows more memory usage and can be much faster than regular Vista, but only if you buy special 64-bit software programs. This machine is loaded with every conceivable port and connector, mostly hidden from view, and the high-end model even has a TV tuner.

But this is still a Vista computer, with all of the disadvantages that entails, especially a sluggish start-up and an annoying barrage of pop-up warnings. And the new TouchSmart is preloaded with craplets, those irritating trial programs and come-ons that you didn’t order.

There’s a built-in Webcam that works in low light, but it’s almost impossible to tilt the computer forward to get the best shot. Plus, the TouchSmart software interface is very basic and is ragged around the edges. It isn’t a multitouch interface — like the ones on the Apple iPhone and in the next version of Windows, code-named Windows 7, that recognize a variety of gestures and perform different tasks when multiple fingers are used rather than just one. For example, you can’t rotate a photo on the TouchSmart by grabbing it with your fingers, or move back and forth through Web pages by swiping the browser with your fingers.

The TouchSmart software is just a thin shell plopped on top of Vista, and it crashed on me four times during the course of a few days of testing. Also, the limitations of the TouchSmart applications can be frustrating. The photo application wouldn’t let me create albums. The music application didn’t display artist names for some of my MP3 files, and the calendar application can’t display an onscreen reminder of an event if you’re working in the main Vista interface.

If you’re intrigued by the idea of a quick and simple interface on a handsome one-piece Vista machine, the TouchSmart might make sense. But it doesn’t deliver on the full promise of touch computing.

• Find all of Walt Mossberg’s columns and videos online, free, at the new All Things Digital Web site, http://walt.allthingsd.com. Email him at mossberg@wsj.com.

The latest to arrive is the Samsung Instinct, to be introduced by Sprint (S) on June 20. I’ve been testing the Instinct, and while it isn’t a bad phone and has some features the Apple product lacks, it’s no match for the iPhone. The manufacturers haven’t replicated the iPhone’s greatest strength: beautiful, powerful, breakthrough software.

Samsung Instinct

Also, the timing of the Instinct is unfortunate. It was designed to go up against the first iPhone. Sprint even has a Web site (nowisgood.com) comparing the two devices. But the Instinct will go on sale only three weeks before Apple and AT&T (T) start selling the new 3G iPhone, the second-generation model announced earlier this week. This second iPhone model corrects some of the first model’s main weaknesses, wiping out some advantages Sprint hoped the Instinct would have.

Before getting into the details of the Instinct, a few words about the new iPhone, its main competition. I don’t do full reviews of products until I have tested them extensively, but my first impressions of the 3G iPhone are largely positive.

The price of the new iPhone’s base model, which comes with 8 gigabytes of memory, is $199, a 50% price cut from the comparable first-generation model. Yet, it now works on AT&T’s fastest data network, promising anywhere from two to five times the speed of its predecessor. It also has GPS for tracking your location, and fully supports over-the-air synchronization of email, contacts and calendars — through Microsoft (MSFT) Exchange in corporations or via a similar new consumer service from Apple called MobileMe. And you’ll be able to download directly to the phone a whole universe of third-party programs, from productivity software to games.

On the downside, the new iPhone’s camera remains very basic and still can’t capture video. For people who prefer physical keyboards, the iPhone will still fall short. It continues to include only a virtual onscreen keyboard. And the iPhone remains locked to a single carrier in the U.S., AT&T, which will charge $10 more per month for unlimited data consumption on the device.

The iPhone, along with some competitors like the BlackBerry, are really hand-held computers that happen to make voice calls. And they’re getting more powerful and innovative. So far, competitors like the Instinct, while trying to look like iPhones, are still mainly voice devices with so-so computing features tacked on.

For instance, while the Instinct is a touch-screen device, it lacks the iPhone’s “multi-touch” system, which includes features that recognize multiple fingers and gestures, and allows actions like shrinking a photo by “pinching” it. The touch system on the Instinct is more like that on an ancient ATM than a cutting-edge gadget, even though it has a gimmicky feedback mechanism that gives you a tiny vibration-jolt when you press an icon.

Physically, the Instinct looks a lot like the iPhone — a dark slab without a physical keyboard or many buttons dominated by a large screen. It’s a bit longer and thicker than the iPhone, but a tad narrower and lighter. Its screen is smaller than the iPhone’s and has lower resolution.

The Instinct has the same $199 price tag as the new iPhone, after a rebate and with a two-year contract. Service plans are likely to start at around $70, in line with the minimum monthly fee AT&T will charge on the new iPhone. But it comes with just one-quarter of the memory the base iPhone includes.

Like the 3G iPhone, the Instinct runs on a fast cellular network that promises speeds similar to what people get with slow home DSL service. In my tests, it seemed to deliver this promised speed. It also has GPS and navigation. But, unlike the iPhone, the Instinct lacks Wi-Fi wireless networking, which can often be faster than the cellphone networks or available where there is no speedy cellphone coverage.

The Instinct has a removable battery, something the iPhone lacks. And Sprint claims 5.7 hours of talk time on one charge, more than the five hours that Apple claims for its 3G model. Sprint’s new baby has a few other features that even the latest iPhone omits, such as a built-in service for viewing TV shows and a voice-command system.

But I found its email system and Web browser to be less sophisticated than the iPhone’s or the BlackBerry’s. I also thought the phone’s onscreen keyboard was harder to use than Apple’s. It would flip unpredictably from landscape to portrait mode. The Instinct does allow handwriting recognition as an alternative, something the iPhone doesn’t.

If you’re a devoted Sprint customer, or want to avoid AT&T, the Instinct is an OK choice. But it’s no iPhone.

• Find all of Walt Mossberg’s columns and videos online, free, at the new All Things Digital Web site, http://walt.allthingsd.com. Email him at mossberg@wsj.com.

In fact, your boring old cellphone has enormous potential. Here is a guide to checking your email, looking up information and updating your calendar, just by sending text messages. You can use any cellphone, but you’ll need a generous text-messaging plan.

For email, I tested TeleFlip, a free service that lets you send and receive email via text messaging. TeleFlip works with any email account that doesn’t require a secure connection to the Web. That applies to all the major Web-based email providers, including Yahoo Mail, Hotmail and Gmail.

Signing up for TeleFlip took me under five minutes. All I needed to enter was my Gmail email address and password, my cellphone number, and a confirmation number that TeleFlip sent to my cellphone — via text message, of course. TeleFlip then had me build a “whitelist” of contacts, by importing my address book or manually adding email addresses. If I receive an email from someone not on that list, I don’t get it on my cellphone — an annoying quirk. (TeleFlip has plans to let users access all of their emails, beginning around August.)

TeleFlip does what it promises — but it’s neither fast nor pretty. It took from three to 35 minutes for TeleFlip to text me my emails after Gmail received them, averaging about 10 minutes. Because cellphone carriers typically limit text messages to 160 characters, TeleFlip chops each email into snippets, sent in successive text messages. You can decide how many snippets you want to receive. I thought three was enough to get the gist of the messages.

You can also instantly send email. TeleFlip assigns a nickname to each of your contacts — the first six characters of their email address. To send email, text TeleFlip at 33715 and type the recipient’s nickname and the message — for example: “walt.m Thanks for your email. I’ll get back to you soon.” It will appear to the recipient as if it came from your email, not your cellphone.

One turnoff: Each time I received an email via TeleFlip, the company sent a one-time email to the sender telling them about TeleFlip. I found that intrusive. TeleFlip says it will let users disable those emails starting around August.

To search the Web, I tried services from Google (GOOG), Yahoo (YHOO) and 4info. Google can be reached by sending a text message to 466453 (”Google”); for Yahoo, text 92466 (”Yahoo”); for 4info, text 44636 (”4info”).

To find information, it’s useful to know some shortcuts: For a stock quote, text message a ticker symbol. For sports scores, type a team’s name. For local information, type “weather,” “movies,” or the name of a local business, along with a ZIP Code or the name of a city. In my tests, all three services responded accurately to my text messages in under 10 seconds.

Each service has unique features. To find local businesses, I liked Yahoo because it includes cross streets. For instance, when I searched for a certain Indian restaurant, Yahoo gave me its phone number and address, as well as the text, “Near the intersection of Valencia St and 21st St.”

I liked that 4info lets you set up customized alerts to your cellphone — texting you, say, when Target’s stock falls by more than 5% (4info.net/alerts/add/stock) or when a Red Sox game ends (4info.net/alerts/add/sports).

Google, meanwhile, sends you driving directions if you text it this: “directions from (address, city or ZIP Code) to (address, city or ZIP Code).” You can also do rudimentary searches by texting Google: “web” plus the search term.

In response to Web-search queries, Google typically sends back text messages with words from the top search results. So, be extra-precise with your search terms. While parking my car, I couldn’t remember what a blue curb meant. I texted Google, “web blue curb” and got an unhelpful result from a university Web site. Next, I typed, “web parking blue paint curb” and received a message telling me that a blue curb designates parking for the disabled.

With Google Calendar, you also can check and update your calendar using text messaging. To start, visit calendar.google.com. Click “Settings” in the top corner and then click the “Mobile Setup” tab to register your cellphone for notifications. Click the “Calendars” tab. Next, click “Notifications” and follow instructions.

You can receive text-message reminders for events. You can also ask for a daily agenda, or even get reminders on the fly at 48368 (”Gvent”). Texting “day” got me the day’s schedule, texting “next” got me my next event and texting “nday” got me the following day’s schedule.

My favorite part: You can add events to your Google Calendar by texting “Gvent.” To add a dinner date for the following week, I simply wrote, “dinner Tuesday 7 pm.” When I visited Google Calendar online a few minutes later, the event was already listed.

• Send email to Vauhini.Vara@wsj.com. Walter S. Mossberg returns on June 5.

Unfortunately, every attempt at this concept has included too many compromises to justify their often surprisingly high prices. I’ve been testing the latest effort at such a device, the Eee PC, from a Taiwan-based laptop maker called Asus. It does better than some of the earlier contenders in certain respects, such as text entry and price. But it still is likely to prove unsatisfying for many road warriors.

Asus doesn’t even call the Eee a computer, referring to it as a “mobile Internet gadget.” Instead of using Microsoft Windows as its operating system, the Eee uses a specially designed version of the open Linux operating system, and comes preloaded with a variety of open-source programs for Web browsing, performing office tasks, playing music and videos, running games and managing photos.

The Eee has a much smaller footprint than even the subnotebook category of laptop, such as the much-publicized MacBook Air unveiled by Apple this week (which I’ll review after I have thoroughly tested it), or subnotebooks from Sony and Lenovo. It weighs a mere two pounds, is just under 9 inches wide and just over 6 inches deep. It is thicker than the new Apple and some other subnotebooks, ranging from 0.79 inches at its thinnest point to 1.26 inches at its thickest. The overall effect is small, but stubby.

The Eee’s price is only a fraction of what typical subnotebooks cost — from $300 to $500, depending on configuration. The model I tested, called the Surf, is the base $300 entry. With its pastel blue lid, and tiny size, it looks like something Barbie might use. But it can perform real work, even though it comes with only 512 megabytes of memory and a scant two gigabytes of storage space.

One reason the device costs and weighs so little is that there is no hard disk. Files are stored on memory chips. It is possible to add storage by popping in a flash memory card or by connecting a USB drive to one of the three USB ports.

Unlike some computers in its category, the Eee isn’t a tablet. It takes the clamshell form of a traditional laptop and, when opened, reveals a full, if very cramped, keyboard. By including a real keyboard and charging so little, Asus has overcome two of the problems that plagued Samsung’s Q1 ultramobile computer awhile back.

Asus Eee PC

The user interface on the Eee is simple and clear. It consists of tabs labeled Internet, Work, Learn, Play, Settings and Favorites. Each tab contains large, colorful icons. For instance, the Work tab includes icons for Documents, Spreadsheets and Presentations. These tabs lead to various modules of the free OpenOffice suite, a competitor to Microsoft Office.

The Internet tab has various icons, such as Web Mail, Web and Wikipedia, that open the Firefox Web browser. You get to this tabbed screen by just pressing a Home button.

In my tests of the Eee, I was able to use all manner of Web sites, send and receive Web-based email, compose and open Microsoft Word documents from other computers, play music, and view photos.

So, with a low price, a small size, a real keyboard, and a clean user interface, what’s not to like about the Eee?

Well, for starters, its tiny 7-inch display is just too stingy for serious work. You can make up for a small screen size with high resolution, but the 800 by 480 resolution on the Eee — which can’t be changed — is so wimpy that very few lines of text can be seen at any one time. This means you’ll have to do so much scrolling, it’s likely to drive you crazy.

Also, the lack of a hard disk, and the relative paucity of truly simple Linux software, means that most nontechie users will be stuck with the included programs, which can’t be removed and which don’t include a calendar or contacts program, or even an email program. You can only use Web-based email.

And just below the Eee’s simplified user interface lurks the complicated terminology and software design characteristic of Linux. Some error messages I saw were indecipherable.

Beyond that, many of the Linux programs included were far cruder and harder to figure out than, say, Microsoft’s Photo Gallery or Apple’s iTunes. The Eee wouldn’t automatically reconnect to a known wireless network, and it wouldn’t recognize my Kodak digital camera.

Some of these problems can be solved if you install Microsoft Windows XP on the Eee. Asus includes instructions on doing so. But you have to supply your own copy of Windows.

The Eee is a valiant effort, but it still has too many compromises to pry most travelers away from their larger laptops.

Email me at mossberg@wsj.com. Find all my columns and videos online, free, at the new All Things Digital Web site, http://walt.allthingsd.com.