Well i`am not sure if it can work but i have an idea...
We buy an ipod/iphone/zune/notebook with video out, PIE AV-POD A/V cable, aux adapter - any, video input converter - any.

If to connect Ipod "sound out" via Auxiliary Input Converter port, and "video out" via Video Input Converter than we can see ipod screen on our navy screen, i`am not sure about ipod but iphone can be managed thrue it`s touch screen so can it be managed thrue our`s navi touch screen the only problem is a feedback from navy to device, but all you remember a TV games attachment + gun. When you shoot in a bad guy on a TV he fell down isn't it a feedback ?

 

It's been done... I had it in my '05 TSX when the PIE video iPod adapter first came out. It works, but the weak parts of the setup are:

1) To answer your question - you can't control anything from your nav touch screen (they're separate systems)
2) You can only control volume from your steering wheel controls - nothing else.

In other words, to advance tracks, etc., you would have to touch the iPod itself.