I actually toyed with the idea of starting a radio station based on the BeOS MP3 player + file system. The thought was to have a system without human DJs that used a simple web interface to gather "votes" for songs/genres, and to use the metadata in the file system to queue up the songs. If I remember correctly, BeOS also had a macro programming interface (ie. AREXX) that could be used to glue things together.

This made BeOS (and BeBox) a great product in my mind; the ability to use it in unexpected ways.