I don't know if you guys keep up with SunOS, but they have recently announced their new project in developement of a 3d desktop environment. Written entirely in JAVA this is a revolutionary breakthroug in the outlook of your desktop as a new 3D environment will take over...
Check it out at: http://wwws.sun.com/software/looking_glass/
Hopefully after it's release (unlike Microsoft this will be open scource), someone will be bored enough to edit the code to make it work with Linux and maybe compile it and make it work for Windows.
If anyone has Cable or DSL, download the Demo (upper right on the provided page). It's awesome, really!