In my opinion, everyone needs one iPod on which to transcribe all your CD's. After that, via iTunes, you can burn disc's which are playable in any of the new in dash units that play mp3's from burned CD's. I have an iPod interface for one of my indash units, but no longer use it. Since I can burn 4-9 hours of music on one disc, which I can cheaply replace if damaged, why subject an expensive iPod to the car environment?