I saw the do-it-yourselfers working on these things years ago, but now a company called Monkeylectric is producing and selling a product for the masses. Very cool.
Where was this when I was a kid? Spiteful? Nah, it’s just that the only thing that got between my wheels was Buford’s skateboard. Lying in a tangled mass of human, bicycle, and pavement is way less cool than rollin’ down the road with the magical love-child of a Spirograph and a Lite-Brite on both wheels.
The Pac-Man one is still the greatest idea evar. You can find that one over at Instructables.com.
I’d still like to program my own. Check these others out from Flickr: