Ohh, sorry, since I'm guest, I can't edit.
BTW, everything is on a single computer.
Speccs:
Intel Core 2 Due E6750
4GB of RAM
8800GTS 512mb (G92)
(12k points in 3dmark06)

Screen 1: 22" Syncmaster, 1680x1050
Screen 2: 17", 1280x1024

I tried 4 instances of WoW at the same time, and sat everyone to follow in a line. Was something around 30-40 fps in the small windows (800x600), and 25fps in the big (1680x1050)