I've been beta testing Windows 7 on my laptop for over a month now and I am really enjoying the experience, it feels much lighter than vista and far more responsive. The new task bar layout is fantastic even if it is just Microsoft trying to imitate MAC OS X. All in all its been pretty reliable so far, it's blue screened on me 4 times, which I dont think is too bad for a beta version, the search function has also been refined, it brings back results much quicker and even searches network location pretty quickly. To summarise, I'm impressed by Windows 7 and will be upgrading when it comes out.
I say, you could create this thread in 'Microsoft' category. B t w, I liked Win7 and going to update my home PC OS.