Tony,

There are several examples of PC <> Satellite radio interfaces. I've been digging a bit further, and the XM Direct tuner interfaces appear to be straight serial interface, and several folks on the mp3car.com forums have software support for in-car PCs.

On the Sirius side of the fence, it appears that there's a serial interface between the display and tuner boards in many of the plug-n-play receivers.

So, I'm hammering out the hardware, I think this will soon be just a software problem.

And the thought of a serial-to-Kenwood bus adaptor isn't unreasonable. The Sirius version of the TimeTrax is basically a USB<>Kenwood adaptor. As soon as they start shipping, I'm sure someone will tear it apart...if there's a USB<>serial chip, we should be able to reach in with level shifters and get a serial interface.

I'll gather up some links tomorrow; I've got an early morning.

-Z