Windows 7 is a rock solid OS. I’ve been running it since it went RC 1. And since I have an MSDN subscription, I’ve been running the RTM (final bits) since like August. That includes running it, via Bootcamp, on 4 different Macs. An iMac, 13” unibody MB, 15” unibody MBP and an older 15” MBP. Being a developer I also had the Dev releases of Snow Leopard. The Bootcamp drivers on Snow Leopard work just fine with Windows 7 in either 32-bit or 64-bit flavors. And BTW, Bootcamp is NOT an emulator, it allows you to boot natively into Windows (or Linux).