Griffin Technology: iTrip Black : FM Transmitter for iPod

Griffin Technology: "The coolest iPod accessory in the world is now available for the coolest iPod in the world - the jet black iPod U2 Special Edition. The iTrip FM transmitter for the iPod can play your music through any FM radio - in your car, at a party - anywhere the mood strikes you and there's a radio.
iTrip is made specifically for the iPod. This gives iTrip advantages over similar devices. For example, with the iTrip, you can have the cleanest possible signal, because you can choose any radio station on the FM dial to tune for the best performance. You do this by 'playing' special station codes directly from the iPod itself. Simple."