would it be possible to cut off the earbuds and splice the wires back into a audio plug, so that the headphones are basically a standard audio cable with a mic in the middle. then you would be able to plug it into the iphone and then into the aux on your car stereo. sound would play through the car, and you would talk into the mic thats been wired to a location near your mouth (sun visor). I figure one end plugs into the phone, then the ear buds are basically a speaker, why couldnt you swap that speaker for a car speaker via audio plug?... this would be very nice to have, you could listen to your music tthrough the car, when calls come in, the ringtone plays in the car and you can just tap the mic to answer.