By getting it to work with Darwin you wouldn't have to diddle too much with the server side of the software (except for the UPNP and NFS stuff).

I get the feeling that streaming media would actually be easier to implement in the server, rather than trying to implement it on the player side.

Since we have things like JReceiver working already, why can't we just have the server software grab some streams from the internet and supply them as available playlists to the Receiver?

(See, the player already streams from the server, it's just a question of formatting the data in such a way that the Receiver knows what to do with it.)