A lot of the work has already been done, like how to pull data from the ECU:
http://www.alcyone.org.uk/ssm/ecureverse.html
Very grateful to the folks who help reverse engineer the ECU protocol.
There is even some on talking with the HVAC computer, although not as much:
http://www.alcyone.org.uk/ssm/aircon.html
Still the biggest factor will be time to work on, it's not a high priority project and there are many other projects trying to suck up my time.
Cheers!
Ian.