Finally got around to fixing the board.. Again, this isn't tested and won't run with the posted firmware (Added software mode control to the CAN transceiver, will need to add control of that to the sketch.)
Board:
CAN_Shield_V0.2.zip
Latest mostly working firmware:
gmPod-100510a.zip
There are still a few small bugs in the firmware I am working on but this is 95% working and working well.