I’ve just installed Windows 7 on my MacBook’s BootCamp partition, and so far it looks great. I’m not new to Win7, having had it installed in a Parallels VM since it was released. The experience on the MacBook’s native hardware, though, is so much better. For a start, it doesn’t die when you try to run (or create) a WPF application. For a developer, that’s a pretty important thing. 
One niggle, though, I can’t get audio. I know there’s a fix, but after inserting my Leopard DVD, the drive has stopped responding. Now I have to boot back into OS X in order to eject the disc.
Oh well, I’m going back to playing with this OS, and seeing what it can really do.