check out www.ipodlounge.com/
they've got reviews and such...
i have an FM transmitter for mine, and it pretty much blows. i have the mini, which comes with a clip attachment. when i store the ipod, i turn the clip around so it protects the face, seems to work well. if you want to listen to your ipod in the car a lot, i would recommend hard wiring it to your stereo, there is a step by step tutorial at the ipodlounge. its for a dodge neon, but with a little imagination you can tailor it to any car stereo...