Wow, PDC just exploded all over the blogsphere today... Lots and lost of noise out there, but here are the best links that will get you most information without sifting through all the feeds.
PDC Keynote Summary - It was neat to sit there and watch as Hanselman's blog posts started popping up, good stuff and still the best overall summary of the keynote.
ASP.NET/Whidbey - All kinds of Whidbey screen shots, this is the awesome stuff that I have been dying to talk about.
Longhorn Development Center - Already some good stuff up here, you are better off reading these sites then trying to piece together stuff from blogs.