So all you Mac freaks….here is something to show your PC friends. Set your system screen saver to something cool (RSS Visualizer) and run the Terminal. At the command line type the following command (make sure your Desktop’s background is not covered with windows):
/System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background
Neat or what? You can stop it using Ctrl-C.