There's no CAN bus on the Phatbox of course, but if we had an open command interface that allowed control and access to tags etc, then it should be possible to add any kind of external protocol adapter, whether CAN, Bluetooth, or whatever. This could be connected to the PB via the serial port on the PCB, but for the hardware shy, maybe this could be done via the 26 way connector with a software layer running on the 8052 microcontroller - then no need to open the box.
Just an idea.
Les.