I've been using gnump3 to stream mp3s to the wife's windows box to play in Songbird.
Works great.
If I play flac files, however, I can't just push play and have it run through the entire directory (i.e. I have to babysit Songbird and push the "next" button after each flac file plays.
I should add that I haven't even looked at the code......I'm just wondering how easy it'd be to get this working.