Because Custom Autosound makes products that can be completely concealed, they are an optimal solution for getting sound in the car. But there are plenty of other options. You can purchase an RF Remote Dock with FM transmitter. Scosche, among a slew of others, have these available. For example, the Griffin iTrip AutoPilot allows you to simultaneously charge your iPod, listen to hours of music wirelessly and, since it's RDS-enabled, you can get song info on your radio display if you have the appropriate source unit. Simply tune the adaptor to an FM station, match the station to your car radio and you are all set. The drawback to this solution is that you will have your iPod and the adaptor visible and of course sound quality will be compromised due to transmitting signals wirelessly on FM (and you'll obviously need an FM stereo).