USA-Spec
I recently purchased an adapter made by USA-SPEC. It's sold by Crutchfield and worked perfectly. I have a CD-changer cable in my trunk that connects to the iPod, so I have full control of the iPod in my arm rest. It was the absolute ideal solution, but YMMV. BTW, the cost of the box was 110, addl cable was 25, and having Best Buy route the cable from my trunk to the arm rest was 40.