Practically every new car is equipped with a button on the steering wheel that connects to your cellphone through the car audio system. Dialing is achieved through voice commands like "call home" or any other number the cellphone already has stored on it. I don't consider my conversation with my rear view mirror microphone while maintaining control of my steering wheel with both hands to be anymore of a distraction than the idea of having a discussion with someone else sitting inside the vehicle. As a ham I suppose it might be possible to come up with a Bluetooth interface of some kind that could take advantage of this hands free technology already built-in to the vehicle. Perhaps using the existing microphone in the rear view mirror and the PTT switch could become a button already on the steering wheel. A little Bluetooth interface plugged into the data port on the rig could make everything happen and the car will just "think" it's connected to another cellphone.