FiiO L1 Line Out Dock Cable (LOD) For iPod and iPhone
This product worked great...for about a week.  it is so cheaply made that the outer cover broke off exposing the circuitry and then it was a matter of time.  the sterio went out and then the wires just broke off.  it would be great if you only use it in the car because it wont be bumped, but any jostle and this thing screws with your sound.