Matrox has a new device called TripleHead2Go, which lets you link 3 x 19″ monitors to attain 3840 x 1024 ultra-widescreen resolution to your single input device. I especially see this as a great choice for laptop users as well. The specs require Windows 2k or XP and supporting display drivers. I would have really loved to try this on my powerbook though.

“TripleHead2Go is not a graphics card but an external box that harnesses your system’s existing graphics solution (including SLI™) for rendering of all 2D, 3D and video, and adds multi-monitor support. TripleHead2Go appears to your system as an ultra-widescreen 3840×1024* monitor and simply connects to your computer via a standard analog VGA monitor cable. Using Matrox patent-pending technology, TripleHead2Go then splits the 3840 x 1024 Microsoft® Windows® desktop into three separate 1280 x 1024 screens of information, and displays across three independent 1280 x 1024 monitors. There is no image distortion and no scaling to the original raw pixels generated from the existing graphics accelerator.”