http://www.avic-n1.com
Yeah, the AVIC-N1 is a nice in-dash unit that can do just about anything. It is a little on the pricey side, but if you poke around on eBay you can save close to $600.
The downside is the installation is alot more difficult than a standard radio installation. You have to install a GPS antenna, hideaway unit, and tap into several sensors/wires on your car (parking brake, reverse light, and VSS). The VSS and reverse light taps are to help the navigation know whether you are moving forward or reverse and how fast you are traveling. The brake light connection is to ensure the DVD video is not played while the vehicle is in motion, but if you just ground this cable then the video will play at any time.
I believe the VSS is used by your car to calculate your speed and is used by the speedo and cruise control.
Luc, thanks for the info. I'll trace the cable down from the ECU this weekend.