Okay, my position has drastically changed. I found an article on how to get the AVIC-Z1 to play video while moving, so I think I will be installing this unit, completely removing the factory HU and CD player (as the Z1 is double din) and connecting the mac mini as an aux in. I loose the touchscreen capabilities for the car computer but I see myself using the remote for front row (mac gui for multimedia) more than trying to touch the screen with my fingers... I will still, however, make the mac mini capable of being moved from the X to the house to update the library and now I can see the mini on the Z1's screen while whistling through traffic...

Let me know if anyone is interested on what I found as a work around for video on the Z1...

Kryptonite