I have an OEM navigation unit on order which I plan to install next week. I was looking on eBay and found this:

http://cgi.ebay.com/ebaymotors/Parts...3756.m14.l1318

It appears that the cable that connects the CD changer to the radio just is RCA connectors. Has anyone used one of these and a RCA to 3.5mm adapter to listen to their iPod through the radio?