Worklog detailing the dock is
here.
I chose to put the Mini where the headunit went for two reasons. First, because that spot was perfect to dock/undock the computer and I was curious to see if I could fit it in a single DIN space. Second, I wanted access to the CD/DVD slot.
The location of the HU in the glovebox is an ugly compromise. I keep the HU not only because I'm too cheap to buy an amp but because I drive the car only about once a week now and often for just 10-15 minutes at a time. About once a month I take it on a 600 mile roundtrip. So I don't always have the computer in the car and need a HU for around town.
One version of my plan was to put the removable faceplate from the HU in front of the computer's location so it still appears stock. I may do that some day, but haven't had the time to work on it.