It's very cool that you're going to be doing this. I don't have any use for this particular project myself, as I have a tuner and would prefer to keep it, but I am going to be working on integrating an XM interface (serial input from/output to the XM receiver, RCA output from the XM receiver into the Empeg AUX.)

Still, there might be some overlap for many of the software tasks of displaying track info, interpreting input commands for changing stations, etc., so maybe we can work together on the software end of things.