Description of problem: gnome-applet-music requires mpdclient for mpd support, while libmpd is provided in repos instead. this doesn't work.
The package includes the mpdclient2 support as a courtesy to users, since it is provided by upstream. However, this is on the assumption that the user has appropriately installed the python mpdclient2 module in a manual fashion. As it stands, the only "upstream" that I am aware of for this module is the tarball itself (from http://pygmy.berlios.de/files/ according to the Debian package for it). However, that is more than 2 years old and has no formal packaging (as the README in the tarball states). Alas, I have no interest in supporting MPD more than simply including what upstream has created. I especially do not care to do so with such an outdated and completely unofficial tarball. That said, if you would like to submit and maintain such a package for Fedora (knowing full well that its upstream is essentially dead), please feel free to do so. Otherwise, you need to install the mpdclient2 module manually, which Music Applet will then find and be able to use. Closing as WONTFIX.