Few weeks ago I have figured out that my old Ford Mondeo's ECU and ABS module are connected to the CAN bus. I was willing to hack the messages and make something useful. However, I could not find any valuable information about my Ford's CAN bus messages and their contents. The only thing I found is that RPM and gas pedal values are in the packet sent with CAN id of 0x201.
Happily I have an Elduino CAN128 board which is Arduino-like board targeted for car hackers. It has built in modules and transceivers allowing to connect it to CAN and LIN busses without any external shields.