I'd like to stream music to my car radio from my Droid, I assume this could be accomplished if this comes about?
Yes it could, and BTW the laws governing max power of an unregistered FM transmitter are not usually the limiting factor for this application. FCC part 15 limits broadcast strength of unlicensed FM emitters to 250 µV/m field strength at 3 meters (yes it's defined in meters) from the antenna, this is powerful enough to travel at least 150 feet.