Tony - Care to elaborate or point me to a thread? All I could find was a thread 'Auto Sense Aux In' , which seemed to conclude that you had to remap a button to 'toggle'. Or is the mute line also considered a remappable button?

I'm interested not for my phone (already have an installed speakerphone) but for my Copilot 2.0 GPS for the ipaq that should be here tomorrow. It will give turn-turn voice directions which would be a great application for a true auto-sensing aux it.

So, any more hints?

-Zeke