let's do the hokey pokey ...
This is far too geeky, even for me!!
Hokey Spokes make a set of LED blades that attach to a bicycle's spokes allowing you to spell out words and make poor images while you ride on around town knowing full well just how idiotic they make you look. The blades communicate with each other using infrared and are actually programmed with your Palm, so you can make changes whilst on a ride.