My system setup:

AMD X2 6000+
ATI x1650 PRO
2GB RAM
2 LCDs @ 1280x1024 in Stretch mode

I am using KeyClone and running 5 instances of WoW from 5 separate installs.
I use Maximizer to run 4 windows at 640x512 on one LCD and another at 1280x1024 on the second LCD.


Performance is fine in instances or out in the world so far, typically in the 30-40 FPS range.
Shattrath is laggy because my machine starts to swap, but nothing that more memory won't fix.
I tested with 4GB I swapped out from another machine and got 25+ FPS.

Here is a screen cap I snapped and stitched together - the white borders are simply for delineation purposes between the images.
On my LCDs the windows are seamless. I will try and get a camera to take photo of it. 4 warlocks 1 priest right now, level 16-17.


My UI sucks I know - it is a very much work-in-progress thing at the moment.
Waiting on KeyClone to fix the extended keys before I put much work into it.