Finally got my Motorola Xoom installed. This replaced my old carPC which was a Windows XP setup.
Its on a pivoting mount and it connects to an amp under the passenger seat. Volume control via knob installed by the emergency brake (which you can see in one of the photos).
The mount is a Padholdr(http://padholdr.com/), and I had a local shop (http://www.benchmarkmotoring.com/) fabricate the Xoom dock into the mount for both power & audio.