I've got a magic doodar that plugs into a lighter socket and an Ipod (or anything with a headphone out), and then transmits on FM radio. Upshot is, assuming you have a radio in the car, you can listen to your music while driving, and play "Born To Be Wild" really loud at traffic lights while revving your 600cc engine to shit and trying to get people to race you. (They never do.)

Any takers?

It's free........