Probably the most detailed site on Windows Vista (and Xbox 360) that I've seen with an increasing gallery on every aspect of the operating system. I'll let him tell ya:
"
Though over a year away from completion, interest in Windows Vista (previously codenamed "Longhorn"), the next major Windows release, is growing at a fevered pitch. So in response to reader requests, I've created this Windows Vista Activity Center, a front-end to all of the Windows Vista/Longhorn-related content I've created for the SuperSite for Windows and other publications, including WinInfo and Windows IT Pro Magazine. From this single handy page, you'll be able to access all of the reviews, the photo galleries, the movies, the technology showcases, the Windows Vista FAQ, and even articles I've written elsewhere. I'll be updating this Activity Center regularly going forward, ensuring that it's always up-to-date with the content you can only get here. Bookmark it today!"
You can check this site out
HERE.
Also, be sure to check out Pauls Windows Vista Beta 1 review
HERE. He essentially covers everything from installation to the way you interact with Vista. Again, probably the best "preview" I've seen on the net to date.
This is the closest you'll get to seeing what Windows Vista looks like, and how it acts without actually installing it yourself. Great stuff.