Interesting....

If you happen to be using the Opera web browser on a Windows XP box...


Set your wallpaper to the picture of a sunset over mountains (a very red sky etc.) - it's one of the standard images that comes with XP

Download and run the Opera Planetwerks widget

Minimise all other applications including the main Opera screen

Enjoy!

Can't show a screen shot because Planetwerks uses a separate layer from other screen elements, but it's REALLY cool!