PicLens is a browser extension for Explorer, Safari and Firefox (and a few others I think) that lets you see certain sites on the internet in 3d. It's pretty cool. I'm more interested in Pogo, AT&T's upcoming 3d browser, but this will do until that comes out of private beta (I'm on the waiting list for that.)

I did a short little screencast, demonstrating how it works. It's actually not all that exciting. I really think Pogo is going to change the landscape, though.