There are a number of things that bug me about Vista, but at the moment Vista64 with 4GB and an 8800GT is rocking some serious FPS both raiding solo and running up to 5 clients (trial keys FTW).

I've gathered some issues with drivers under XP64 and with 4GB I need something above 32-bit.

On the other hand, has anyone tried running Ubuntu 64 and WoW?