I've bought a few AirCable Bluetooth Serial adapters (link to BBS thread here), one for my docking station at home and another for in-car use. I haven't hooked it up yet in the car, but this would be a good solution for a cable-less install where you could still get the serial data out of the player. You could probably even use a terminal program on a PDA to get the output if that PDA has BT support (and the terminal app, too).