Stefan writes:
> If you build two wireless ethernet cards into the linux box and in your
> home PC you would be able to download the mp3 file directly to your car.

Yes, that was part of the plan too.  :-)

I intended to keep a copies (on hard drives) of my entire music library in
my car, at home (possibly in two locations), and at work.

Also, I've built a thing to extract the MPEG audio from the Music Choice
channels on DSS.  It's not layer 3, though, so it's not as compact.

I'm planning to use the PIC16F877 with a 4x20 character LCD (or possibly
VFD) as the controller for each system.  For the car, I'm thinking about
using a pair of RS-422 links, one in each direction, for communication
between the remote control and the Linux box.

In fact, I might have a remote control for the remote control :-)  For the
car I'll probably try to mount the display and such in a DIN-sized box in
the dash, and use another PIC (probably a 16F84) to make an IR remote for
that.