Using LEDs and a "persistence of vision" technique, ladyada has created an animated Pac-Man scene on the spokes of her bicycle. She directs us to her tutorial for SpokePOV, an "easy-to-make electronic kit toy that turns your bicycle wheel into a customized display." Using a free schematic, some open source software, and a kit that goes for about $37.50, you can make your own custom bicycle light show.