Rhythmbox
From wikinotes
Rhythmbox works fairly well out of the box, except that it lacks support for MP3s.
Install:
## Required packages
sudo pacman -S gst-plugins-bad gst-plugins-ugly
## In the event that this does not work, there are some
## older versions of the gstreamer plugins:
sudo pacman -S gstreamer0.10-bad-plugins gstreamer0.10-ugly-plugins
## My conky script works with both Rhythmbox and MPD.