this is a pretty nifty piece of technology....

The DualHead2Go, as it’s known, tricks your system into thinking that your two 1280 x 1024 monitors are really one big 2560 x 1024 beast, allowing your desktop to flow across two screens. Users of certain laptops can even employ the DualHead2Go for hooking up two more monitors in addition to the built-in LCD for a super-cheap three-monitor setup.

from engadget