Actually I had BBC working for a while on a linux box at my home. Here's an old thread that suggested a way to do it (which is what I ended up doing)

http://rioreceiver.comms.net/php/showthreaded.php?Cat=&Board=Technical&Number=2649&page=&view=&sb=&o=

However I gave that box away so the script and code are now floating around Cray corporate. I'll see if I can find out if its still around. Doubtful. But it only took a couple hours to code up a quick .ram-->shoutcast streaming gateway for a stream to the receiver. No clue where I got the doco on the .ram format anymore though, sorry. :-/

edit: remember to post thread link next time. sigh.