Release day 22nd Oct 2009, will Microsoft have got it right first time?
I have tried the prerelease version on an old Laptop and Home brewed PC, both worked only missing a couple of drivers, as soon as Windows 7 connected to the internet any driver issued resolved them selves by magic!
I am looking at buying, I have sent of for the MS training book MCTS Self-Paced Training Kit (Exam 70-680): Configuring Windows 7 Book/CD Package
There are numerous versions of Windows 7 you need to make sure that you get the correct one! Nothing with Microsoft is simple.