iPod Your BMW
"Now, thanks to a new adapter co-developed by Apple and BMW, you can enjoy the ultimate sound experience while tooling around in the Ultimate Driving Machine.
Available immediately for late-model BMW autos, the iPod, and iPod mini, the new adapter lets you use the control functions on your steering wheel to adjust volume, skip tracks, fast forward/rewind a song, or switch to random shuffle. What's that playing now? Just check your audio display. And in addition to delivering 100% of iPod's audio quality to your car's speakers, the adapter (tucked neatly away in your glove compartment) also recharges iPod as you drive and keeps messy wires out of sight. Like to hear more?"
http://www.apple.com/ipod/bmw/
What if I don't want a BMW? What if I want it in my Saturn? *LOL*