I had an iPod touch 1st gen that worked well with an old auto iTrip I have (no sure what model). When I tried it with my friend's iPhone 3g, it said "charging is not compatible". Also tried using the app that acompanies the iTrip. Is there any way to force the audio into the transmiter, or is it disabled by the internal speaker?
PS: soon geting a new iPod touch, and want to know if this one will also face same problem