they sell the anycar kit, which is compatible with the mac head unit.
you can get them with aux/ipod or aux/usb. i emailed them 2 weeks ago and there was a month wait on stock so they should be in soon. looking at about $130 delivered.
install looks easy as too: viewtopic.php?f=22&t=16196 ...there is a walk through somewhere on the audio/how do i thread.
I'm not sure anyone around here has tried the anycarlink on an 08 model. The advanced ice unit is proven however. See the superthread in the audio forum.
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Thanks gentlemen, I did look at the advanced ice unit but generally prefer a factory standard part, all I need is aux in (not using an ipod). I'll have another look anyway.