I don't actually see you using the screen to select things. Does that not work? Can you only use the touchscreen off the actual iphone?
Sorry to bump such an old thread, but I'm interested in doing something similar but with an ipod touch and I want to make sure that I can put the ipod in a cubby or something and just use the touchscreen in the center console to select and navigate through the ipod menus.
EDIT: also, do the steering wheel controls still work for things like song skipping or audio volume?