Iphone Car Adapter

I want to use my iPhone in my car, but don't want to hassle with it. I want a plug in system that lets me dock my iPhone for viewing, routes the mic and speakers to the car, and sends the video out to a screen behind my headrest for viewing and interaction for my backseat people. Obviously, it should charge the thing as well, maybe even make a data backup for it on a separate internal HD. Please, Apple, Make this..