If you're looking for the perfect all-in-one car solution for your iPod, you may want to consider DLO's TransPod. It plays your iPod music over your car stereo, charges your iPod, and mounts it as well. Just plug the TransPod into your car power adapter and you're all set. There's no install necessary and it allows for 4 preset stations and features a crystal clear sound.
It retails for $99.99.