I spent some time this weekend downloading RC1 of Windows Vista. I currently have it installed on a second laptop and am trying to put it through its paces. If I find out anything earth shattering (or just something that I am sure I will want to know later) I will post it here.
Oh, how can you get it? Well I got it off of the MSDN Subscriber downloads page. It was listed as one of the new postings so I went ahead and snagged it. I am not sure if they have a pay-to-play program for people who are not MSDN subscribers.