I can speak on this. Griffin Technology has a slew of products available for you Air...
www.griffintechnology.com. Try the iTrip, but it really doesn't work good if you live in an area saturated with radio stations. Of course if you have the cd/tape system, you can just use the line out....plug the pog in, and use the car volume controls. Or wait about 2 months (if you have a tape deck also) and Griffins new Smartdeck will be out. It is a tape that goes into the tape player, but when you push forward, scan, rewing, etc, it controls the functions of the iPod. I would wait on that.