i read all the vista drivers should work for 7. I have win 7 64bit. The only drivers i needed were for video card and sound.
Video - ATI 8.12 Vista 64 driver
sound - Gigabyte's Realtek vista driver
both worked flawlessly. I have read a lot of people having trouble with beta drivers. Like i said, i read vista drivers will work.
I've had it running since late friday night. Running Farcry2, left4dead, COD5, Ventrillo, fraps, 3dmark06, etc. Typical gaming stuff. No issues.
have you tried the vista drivers?