Well, the Vista release has been thoroughly uneventful, so the "Wow!" certainly didn't start there. On the other hand the WPF blog has a post about something that really makes me say "Wow!" and it's even Vista related.

There's an awesome WPF/E Vista mockup on the web, complete with Office 2007 applications and other cool stuff. Check out the screenshot below. I've tried it on both IE 7 on the PC and Firefox on the Mac and both work really well. I'm very impressed!