http://honeybrown.ca/Pubs/BumpTop.html The video is a big download, but it's pretty cool to watch. While I honestly don't see that type of desktop structure working with any large amount of files (unless there is some type of 'filing cabinet' system for files that aren't 'current', that isn't advertised of course), it is a very good idea. :)
PS: I'm still sick, although I'm definately on the tail end of it.
PPS: If they're good I'll try to upload the pictures I took with my Razr over the weekend tonight.