Hm, interesting.... They go only through BlueTooth, don't they?

I employ a rather primitive solution in leased or rental cars: I have a spare Apple universal dock that comes with a primitive remote. Line out goes to AUX in on the head unit, and other (USB) cable to cigarette lighter to USB adapter. I jam the dock into a cup holder (and in some cars put a bit of packing foam behind the iPod to lessen vibration stress to the docking connector). Then I can either use controls on the iPod itself (160GB classic in my case), or on the remote, if I can find a handy place to jam, glue or otherwise mount it.

I tried one of those RF modulator thingies, bur results were terrible.

Sigh. Compare that cludge to empeg!

Bonzi

P.S. I just bought one of these thingies on eBay - three lighter sockets plus an USB for $5.99 and free shipping (from HK to Croatia!? - I will be happy to receive anything), so that I can plug in iPod, Garmin and still have a socket or two free.