I'm not sure if this has been posted yet, but for anyone who's not upgrading their base audio system and wants a good Ipod adapter cable, I got one from CablesToGo.com (
4ft iPod-Compatible 3.5mm to Dock Connector Audio Cable - Cables To Go). It's a 3.5mm AUX input to dock connector, you get the best possible sound quality becasue it connects directly to your Ipod's dock connector and not the headphone jack.