If you're into all things sci-fi and Outer Space then the Space 001: Invaders Screensaver might interest you.
This hypnotic screensaver contains an animation of a bizarre Space-age scene, which plays while your phone is idle. It's difficult to make out exactly what the animation is showing, but it seems to be some kind of alien light show in front of a load of planets in orbit.
You'll need Flash Lite installed on your phone if you want to run Space 001: Invaders Screensaver. The quality of the animation is much smoother than animated GIFs and it's scalable.
Despite its rather abstract nature, the Space 001: Invaders Screensaver will appeal to those interest in the Universe.