This is a brand new bit of kit from Dension. The Car Dock for Iphone.
Works with Iphone 3, 3G, 4 and 4s. Once installed, Simply download the Car Dock Dension App from the App store. go to settings, set FM requency and store to a radio pre set. This image shows the dension car dock set to pre set station 6. Play songs, google maps with voice, phone calls too. The Car dock Also charges the Iphone.