Windows 7 + Snow Leopard = no major problem
Whether or not Apple supports Windows 7, it DOES work. I used the Ultimate Steal promotion to buy win 7 (you don't necessarily need a .edu email; however, it must be an approved email. Mine is @fleming.on.ca, btw). I have an early 2009 Macbook pro; the only issues are my Magic Mouse so far won't work with win 7, and when using Visual Studio 2008, I occasionally have the computer freeze and require a restart.
If you are considering the Ultimate Steal to buy win7, you should consider grabbing Office 2007 - it is even a better deal.