Paul just let me know he has put up a huge and indepth look at the road to Longhorn, what's in Longhorn and hints at the new UI code-named Aero.
This is definitely one for everyone interested in Longhorn. Paul has also cleared up the issue about what WinFS is, as everyone has been stating it just sits ontop on NTFS and is not a new file system.
Also included in this review are a few pictures of that WinHEC demonstration of the crazy spinning Windows. If you're interested in Longhorn then be sure to check this one out.
News source: winsupersite.com