This probably isn't the answer you were looking for, but maybe you can use both.
Install the Audrey in your console, and have it run vncviewer. Have VNCServer running on your other box(IA) that has your GPS stuff. Just make sure that they are networked together and bam.
For my car, I "obtained" a small lcd to mount, a vga-->tv converter, a micro-atx motherboard, and a celeron cpu. (all REAL cheap". The GPS is hooked to the motherboard via USB and the case is mounted underneath the passenger seat. I have a "Virtually Indestructible Keyboard" (the soft roll-up kind for storage in the glovebox - just in case I need it [USB]) and a micro-trackball.(also USB)
The only thing that this lacks is the touch screen.