I got this through the maillist and I have to admit that even though I'm not a graphical interface kind of person, the idea is awesome!
It's a new concept of having a "desktop" where you treat it like you treat your own desk: Have stuff laying around, stuff pinned to the wall, stuff piled up, ...etc.
If you're a person who liked graphical effects and like to interact with your computer, I think this fits you quite well! (It even has themes!)
The original video of the idea is here. It explains the idea & its origin.
Software: http://bumptop.com/ -- Currently Windows only, but you can vote for Linux &/| Mac.
If you run this software, kindly leave your feed back here, or link back to me with your own review of it.