I am running Win7 on my Home box, work box and laptop along with my home netbook.
Running SQL 2008 fine, VS2008 also fine. No driver issues other than having to download my netbooks wireless driver myself all other hardware (including fingerprint reader) have worked right from the install. Must just have got lucky with the hardware i have.
(all Dell other than the netbook which is advent).
IE8 has been my biggest issue, i get 5 or 6 crashes a day.