A new 3D browser has been released at
http://www.spacetime.com/
It basically uses Internet Explorer - yet it seems to be a great idea as it looks so much different than regular browsers
From the web site:
Your regular browser has one window. When you create a new web page, it replaces your old web page and gives you a tab. But what if you had unlimited space? What if you now had: here, there, and the space between? SpaceTime™ is proud to introduce this "space between" as 3D Tabbed Browsing. Just enter your websites in the address line as you normally would and watch as your web pages are individually displayed in a stunning 3D space where you can view all of your web pages at the same time. Effortlessly shuffle from one page to the next in your 3D space by clicking on the icons for these web pages on your timeline. It's that easy.
New 3D Browser Tool 
