An elegant music client for MPD
The project is hosted at https://developer.berlios.de/projects/sonata/.
There you can file bug reports and feature requests, etc.
There are also a couple of mailing lists:
sonata-users - Questions, comments, suggestions
sonata-announce - Release announcements, low volume
sonata-translations - For translators
And there is an IRC channel too:
#sonata @ irc.freenode.net