I ended up buying a DVD player (SeVIC brand) that is held in a sleeve over the headrest rather than a replacement headrest solution. The main benefit being it can be moved to a rental car when on vacation:
For connecting a rear headrest DVD player, I decided to put a pair of phono (RCA) inputs and a 12v power outlet in the center console:
Then for the iPod (DICE connection) and power for the GPS system I put a couple of holes in the drivers side glove box. The main challenge here was removing enough of the dash plastic that surrounds the glovebox in order to get the 12 outlet in. A few minutes with the dremel sorted that out though.
I know I need to put a grommet around the ipod connection. I just got those delivered last week.
Finally because I got a basic model, but still wanted the steering wheel controls I installed the OEM switch using
this post for inspiration:
It took several passes with the dremel to get the fit almost right. When I get some spare time I'll probably take it out again and just level it with a sanding block.
The keyless entry beep removal was made easy with this hint:
Remove keyless entry picture
After seeing the MaxAir 4.0 re-seating a bead and inflating 8 tires non-stop I decided to install one under the hood:
The hardest thing here was probably routing the thick power cables and mounting the compressor to the wheel well. The picture was taken halfway through the install, the power is mounted on the sidewall where the horn used to be... have to take an updated picture to show the full install
I'm still thinking about 110V out, but that will have to wait