I have a Lexus IS250 2007 and installed the
Vaistech SoundLinQ2 (SL2Vi) - iPod Video Interface Adapter. It allows me to watch movies & listen to music on my iPod & V1 iPhone via my GPS screen. I can also listen to the music on my 3G iPhone, but it will not charge the phone. Vaistech are in the process of fixing that problem. But it looks like Scosche already has a solution.
I can also control my iPod and V1 iPhone via the GPS touch screen. The car has built in bluetooth, so that's not a problem either.
Modern technology.