I've got a different adapter (www.canusb.com) reading CAN bus in my vehicle. I've got some diagnostic apps written in Qt, but I'm waiting for MeeGo so that I can run it on an Atom based board. There is a ton of info flying over the CAN bus, thousands of messages per second. I've found accelerometer data, steering wheel position, pedal positions. A bluetooth CAN reader would be a great device for the N900.