A couple of years ago, I was looking for a simple linux jukebox script for my MP3 collection. Since it would be running on an old distro, and be exposed on a public port (at the time), I needed the following requirements:
I couldn't find one, so I wrote my own and called it the Venus Music Server. You can read more about it and see screenshots at the Venus Music page on SourceForge.
Oh, did I mention Venus Music is open source?