I have a friend who wants to buy an ipod because he can plug it into a FM adapter and listen to it in his car. Is there an equivalent for the Blackberry?
Amazon.com: Scosche Audio FM Modulator - Universal: Electronics
or something similar, and a RCA-to-Mini cable. the only other thing you may need would be an antenna adapter, but that depends on the make and model of your car. also, any car stereo installation center should be able to install everything for around $40-$50 or so...
if you want more details, look at my reply in this thread...