I think the hardware is a combination of a obd-serial reader and a bluetooth modem, but they were a little sheepish on the hardware details
Note, the mpguino now outputs useful data on the serial port (as of .74). It should be easy to wire it up to a laptop/cellphone.
Or you can hook up a bluetooth modem (like $65) from a place like sparkfun, or maybe the $
40 smd module will work? I haven't really looked into, or used,
bluetooth much so I don't yet know the difference. Wire is cheap