Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
After many years of being a member of the bandwagon to unseat Rhythmbox in favor of Banshee as the default, I end up getting a PS3 and regretting my choice in media player due to the one small gem that is the Coherence plugin for Rhythmbox.
The Coherence plugin allows your Rhythmbox install to act as a UPnP media server on your network. Any UPnP client, such as a PS3 or Logitech Squeezebox device, can then connect to this server and access all of the music from your library.