Tested it with the RC2 x64 Microsoft WDM Drivers for my Geforce 7950gx2, since Nvidias
driver as shait... and it was a bit choppy but playable... (AMD64 4000+, 2GB RAM)
Disabling Aero should have little, if any, increase in performance.
Since WOW is still a 32bit application, its possible, especially because the
BG's are now cross-realm, that the program is using some 32 bit calls that
x64 simply doesn't like.