I don't know much about the AUX in stuff but have been fevourishly working on a solution to get an easy AUX in working on my McIntosh stereo in a 3.0RB Wagon.
Have come across this little device -
http://www.pie.net/store/index.cfm?action=ViewDetails&ItemID=122
Can canyone comment as to whether they believe it would work or not ?