We've got an Enterprise Agreement with Microsoft at work so in theory we're supposed to be able to get our hands on it right away in November as long as they stick to that date. Last I heard, Bill Gates said that it had something like an 80% chance of hitting it's release date.
I've got a 1 year old laptop at work that is pretty nice. 2GB of RAM, wide screen, and a bunch of other stuff. Long story short... I ran the Windows Vista upgrade advisor on my laptop and it can't even run the AERO interface. It can do everything else however. I think it said you needed a 128MB video card to run the AERO interface. It's been awhile since I did this, so I may be a little hazy on the details. Basically it looks like if you want to run full blown Vista you need a pretty nice PC with a pretty good video card, or a bleeding edge laptop.
I'll guinea pig it on my laptop anyway, once we get it, even though it won't do AERO since we have to test it out in the department before unleashing it on the unsuspecting end users.
Maybe I can convince my boss I need a new laptop...
If I weren't in IT though, I would probably hang with XP for the foreseeable future. Critics aside, it is a pretty damn solid OS. Especially in a business environment. Nothing else comes close.