2x 1600x1200 monitors, hooked up to separate computers. I use Synergy to move between them seamlessly with one keyboard/mouse.
http://xs124.xs.to/xs124/08056/fullscreenshot154.jpg
Left:
- Windows XP x64 SP2
- GSM Visual Style
Right:
- Ubuntu Server 8.04a w/ xubuntu-desktop + compiz-fusion
- GSM GTK Schema / Window Deco
Both using the same wallpaper
Thats sweet.