I'm about to take a long (9 hour) car trip, and would very much like to listen to my iPhone along the way. I have an old Monster-brand FM transmitter that I used to use with my video iPod, but it will not charge the iPhone. So I'm in the market for a new FM transmitter that will also charge the iPhone--and wondered if anyone has a particular recommendation? All of the options in the apple store seem to be uniformly despised in the reviews, so any input would be appreciated. Thanks!