I have an ipod touch on mine. Ran the cables to the center console under the armrest. I just manually control the ipod from there. This cable...
http://www.apple.com/uk/shop/product...osite-av-cable
I ran a 5 meter composite extender cable and a 5 meter usb extender cable to make it reach. It charges from the cigarette lighter in the boot.
A bit low tech but works very well for both video and audio. The ami cant do video so for me its not worth buying just to be able to control the ipods music on the mmi.
My other AV is free at the moment, had plans to install a tv tuner as the cars tuner is useless now. Im not sure if any tuners are reliable enough to make it worth the effort.