http://www.spacetime.com/ SpaceTime is a new tool for searching the Web in three dimensions. You can search using Google and Yahoo, or dig deeper into niche services like eBay and Flickr.
Recommendation
A neat way to search. Time will tell. I'll post an update. This would be really nice with a touch surface...
Discussion
Results show up in a swirling sky-like environment where you can sort through rendered pages in stacks, similar to Windows Vista's Flip 3D window-shuffling effect and the upcoming Time Machine in OSX Leopard. You can maneuver around any page, and zoom back and forth. To see any result up close, just double-click on it and it will revert to a customized browser window that's running a shelled version of Internet Explorer.
SpaceTime installs as an extension, and is by no means a lightweight Web app. The minimum hardware specs will likely put it out of the range of most computers that are over two or three years old. In our testing, we found it to hog a considerable amount of RAM and CPU, so unless your machine is beefy, you're likely to have an undesirable experience. It's also limited to Windows machines, so Mac users are out of luck.