Dell is adding multitouch to several products lately, in some cases quietly doing so. The latest is an updated version of the Studio 17 laptop, now available with a 1,600 x 900 display with full multitouch.

Aside from that the usual options are available, like your choice of Pentium Dual Core or Core 2 Duo processors, up to 8GB of RAM, up to 1TB of storage, integrated Intel or ATI graphics and an optional Blu-ray drive.

So now we have two major manufacturers offering multitouch displays. Who will be the third? HP Compaq’s L2105tm is available today for $300. This display is fully certified for Windows 7 and features a 1920×1080 resolution, 1000:1 contrast, 5ms response time, and sports VGA, DVI-D with HDCP connections.

It supports one and two-finger control. If you are old school there’s a plastic stylus hidden in a nook around back.

Looks like Gateway is getting in on the multitouch action like everyone else. Why not? Windows 7 makes it easy. The company has unveiled the One ZX lineup, which will consist of the ZX6800 series and ZX4800 series. Both will ship with Windows 7.

Some specs: The higher end ZX6810-01 will include a 23-inch multitouch LCD (1,920 x 1,080), 2.33GHz Core 2 Quad Q8200S CPU, 1GB ATI Radeon HD 4670 GPU, 8GB of DDR3 memory, an 8x slot-loading DVD burner, a 1TB HDD (or 64GB SSD), WiFi, Gigabit Ethernet, six USB 2.0 ports, an eSATA socket, bundled wireless keyboard and mouse, integrated HD webcam, hybrid TV tuner and built-in speakers.

This wireless keyboard is from the future. It’s here to laugh at other keyboards that do not combine a multitouch trackpad with a ten-key number pad, which saves space and adds functionality. It’s available now for $69. Soon all keyboards will be like this.

The multitouch feature registers a series of two and three-finger presses for scrolling, zooming, window switching, tapping, and more. The entire keyboard is less than 3/4 of an inch thick and includes 18 hotkeys for launching various programs. The wireless USB adapter snaps into the bottom of the keyboard if you want to take it with you.

Looks like LG isn’t going to have any secrets left where the Arena KM900 is concerned by the time Mobile World Congress comes around on Monday. They’ve released some more info, mostly having to do with multitouch capabilities for image and web page zooming and the like.

It features a dedicated multimedia chip and names for each side of the interface’s 3D cube. Those names are: phone, widgets, shortcuts, and multimedia. Get this. The UI “took 100 man years to develop”. Chuckle. At this rate, we will learn all there is to know before Monday.

Apple’s Mighty Mouse already offers a 360-degree scrolling capability with a multi-button interface. We really didn’t think there was much room for improvement. That’s because MacBlogz has done all of the thinking for us, creating this simple yet elegant prototype of how a multitouch Mighty Mouse might look.

It’s aluminum and its profile is kinda sexy. The scroll ball on the Mighty Mouse has been a problem for most users, so this design makes a lot of sense and should this concept mouse actually make it into production some day, users will be very happy campers.

HP has announced the TouchSmart tx2. The laptop will be able to distinguish between voluntary pinching with two fingers and any accidental input. You can also use the bundled stylus to enter data. The tx2’s 12.1-inch screen is fully multi-touched up, but not in the iPhone/iPod touch way. It uses capacitive touch, which enables more accurate input, also brushes and swipes and two-handed gestures. You can use two hands to crop photos for instance.

Some other features are: integrated digital TV tuner, dual core AMD Turion X2 processor and ATI Radeon 3200 graphics. The screen can be twisted and folded all the way around; converting the standard notebook into a tablet PC. With a digital pen you can make notes and your writing will be converted to editable text. The HP TouchSmart tx2 will be available in January 2009 for about $1,150.