Wow this "post your desktop" thing just made me think of a funny prank to play on one of your friends when theyre gone...

Prt scr their desktop with the icons and everything, crop out the taskbar, make it like 5% taller (to compensate for the loss of the taskbar) and save it. Then set the image as their desktop image, take all the icons and put them in "my documents" in a secret folder you make up inside my docs, and put my documents right on top of the one on their desktop image.

Finally sit back and watch as they become frustrated trying to click on the icons that are part of the desktop image.. LOL