I managed to interface my Powerbook on the car display system and I use Front Row with my Bluetooth cell for music, pictures and all that goes with it.For now, the PowerBook is put in the Net located in the trunk to protect it from road vibrations. Afterwards, just use the K750i as a bluetooth remote.
Actually the car has two AV inputs yet no-one by Audi knew how to plug it. The Audi system was a bit complicated (not as simple as with Peugeot that will bring a cinch in the glove compartment), it first took unmounting all the audio and navigation devices, located in the trunk, and find the position (as Audi provides no mounting indication)
I showed that to the Audi techs and they were astonished to see the Apple interface! If Audi and Apple were to get a bit closer (now that they officially supportthe iPod), they could create a hell of a system!
Next step will be plugging a Mac Mini, for instance using a 12v->220v adapter.
The PowerBook is only a temporary solution, and I plan on installing a Mac Mini... as everything is in the trunk, where there's room enough to store a mac mini in the Audi rack
