If one monitor just isn't enough, then you may want to take a look at the Matrox TripleHead2Go. This device lets you connect up to three monitors to your PC's graphics card simultaneously for a combined resolution of up to 3,840x1,024 pixels.
This gives you a ludicrously wide Windows desktop that's perfect for viewing multiple application windows simultaneously, or for ultra-widescreen gaming.
The TripleHead2Go is compatible with a heap of Windows graphics cards and Matrox says it'll work with around 150 popular games, including Quake 4, Brothers in Arms: Earned in Blood, Age of Empires III, GTR and Flight Simulator 2004: A Century of Flight.
The TripleHead2Go looks pretty easy to install, too. It's a palm-sized box that doesn't require you to open your computer -- you just connect it to your graphics card's DVI or VGA outputs, then connect your screens, install the software and away you go.
It costs around £170. Check out the Matrox site for more information. -RR