I've played world 1 through world 4 on Revision 6483 (x64) with no crashes and 95% perfect audio (using two real wiimotes). Outside of the Bloom issues on the ocean levels the graphics are almost perfect as well (D3D11 plugin). Honestly I can't say how pleased I am that this game runs so well after having only been out for 6 days.
Processor: Intel Core i7 940 @ 4.01Ghz
Card name: EVGA GTX 580
Monitor: 1920x1200 WFP07
Memory: 6148MB RAM
Sound: ASUS Xonar Essence STX
Operating System: Windows 7 64-bit
Card name: EVGA GTX 580
Monitor: 1920x1200 WFP07
Memory: 6148MB RAM
Sound: ASUS Xonar Essence STX
Operating System: Windows 7 64-bit