Just a small update for those following Vista, if you participated in Beta 2 you can now download the Vista RC 1 image. This is only for those who were originally part of the CPP for Beta 2, and not for the general public, so you'll have to wait a bit longer if you weren't in it before. Microsoft has promised to open CPP for more people during September, so you'll be able to download it again. And as usual, the file size is quite heavy:

Although users of Microsoft's Vista newsgroup were unanimous in saying that they had not yet received e-mail notification -- which will include a registration key necessary to install RC1 -- the .iso file has been posted to Microsoft's download site for both the 32- and 64-bit versions. The former is listed as 2.52GB, while the latter weighs in at 3.59GB.
If you're in CPP, go ahead and snag it.