I too just bot a Mini Transpod for this application. The Mini has a socket for the Shuffle or takes a cable for larger iPods and has a stereo jack input. I want to have my Mac 12" PB on my boat to do chartplotting with iTunes in the background wirelessly connecting to the normal AM/FM radio and speakers. Sort of a Maxi iPod. I will get it all working this week. Glad to hear you like the quality.
Roy