NYLUG member Robert Menes presented the Rockbox open source jukebox software at the most recent meeting. The software project started in late 2001 when Bjorn Stenberg became fed up with his ARCHON MP3 player and the software was first released in 2002. The software is designed to be installed directly onto MP3 players and to add to rather than replace the existing firmware, but there are many many different MP3 players, and the project supports them to varying degrees (details on the Rockbox website).