We got to try out Matrox's triple head dongle and we can state that a) it works b) it's pretty cool. Until Matrox's DualHead2Go, if you wanted two monitors you had to get a dedicated graphics card and run all sorts of fancy drivers. No, thanks to the TripleHead2Go, if you want to play an immersive game of FreeCell, all you have to do is whip out this small box and plug in your three monitors. Setup, as expected, is essentially painless.
The device comes with a power supply, some adapters, and a CD with drivers and documentation. Our test setup consisted of a Pentium 4 SFF PC, a Xerox LCD monitor, and two old Sony monitors from 1920. The LCD required the included DVI-to-VGA converter while the other two monitors plugged in just fine.
After a bit of confusion during the initial start-up, we were able to install the drivers and now had a widescreen Windows PC. A small LED on the front of the unit lights green, informing you that everything is just fine. Driver installation is key in any case, so until you pop in the CD and reboot, your triple-head PC is just a single-head.
The TripleHead2Go doesn't work with OS X, which made me very sad. We're also assuming Linux is right out. In terms of performance, we didn't notice any problems when comparing our ATI card driving one monitor or three. The maximum supported resolution, after installation, is 3840x1024 and the included PowerDesk utility allows Windows to support 3840 wide windows, which is quite a treat. If you're intending to create a new PC with this set-up, we recommend picking up three identical monitors with small bezels. Anything bigger than an inch detracts from the total majesty of the 3840x1024 experience.
TripleHead2Go costs $299 and is available online and in most retail stores. If you're looking to expand your Windows Vistas (har har), this is the dongle for you.
Product Page [Matrox]