not a federal issue
While getting bluetooth integrated for free would be a nice little touch, trying to pass federal regulation about driving and talking and hoping manufacturers would suddenly get nice is not the right way to go about it, IMHO. If you run around in tech circles, you constantly hear Europeans screaming how "backwards" and "behind" the US is in technological adoption. This is especially true with cellular phone technology and the haggard old "GSM vs CDMA argument".
Never having been here, they have no concept of how much area our country really occupies, and how much of it remains unoccupied to this day. The fact that we have states the size of their countries still escapes many of them. We have the appropriate cellphone ban laws in the states with the high population centers that need them. New York, New Jersey, California are the big ones that I'm aware of. It wouldn't surprise me if some cities have their own bans, too, where the states haven't taken action yet.
Remember, the Federal Government is supposed to be as small as possible (and accountable to the people, too, for that matter.)