richbee

I'm just wondering if it would be possible to fit a wifi reversing camera to your car and use your Android handset to view the feed? It would make it much neater than a separate screen like most of those camera combos have.

SH100 Wi-Fi Camera with Galaxy S Remote Control App Launches from Samsung | Android Phone Fans

Like the above link, but with a cheaper, mountable camera.
Or even better a camera with magnetic or other mount which could be put anywhere - a bit like the one they had on the Range Rover which could be put away from the vehicle to view your off-roading from inside the vehicle

snapper.fishes

I know you can set up a server to link your phone to a webcam, but that might be a bit too much inside a car.