Watching this thread with interest. I'm (very) slowly working on my car computer, which features a forward (and possibly reverse) facing camera with some telemetry at the bottom of the frame. So far I've been planning to keep it simple - km/hr speed (via GPS), L/R indicators, stop lamp, maybe horn to signify an event - but if there was a way to hook into the OBD connector permanently it may be possible to pull out some more interesting data. How cool would it be if the vid capture also showed throttle position, RPM, and the current gear the auto was in?
