I recently came across a bunch of stuff done by Daniel Moth, a Developer Evangelist for Microsoft UK. If you are a managed developer and want to see the new stuff you can leverage on Vista, be sure to check out his stuff.
If you want to digest some of these new features in Screencast format, be sure to check out some of these screencasts that Daniel Moth has also done:
Enjoy! And thanks go to Daniel for all of these :).