There is (currently?) no advanced support for playlist management; i.e. you cannot add songs to the playlist. You will have to use a rich client on another machine for this.
You will need MythTV installed with the MythMusic plugin.
tar -jxvf mythmpd.tar.bz2 cd mythmpd qmake mythmpd.pro make make install
Currently, MythMPD can only connect to the mpd daemon running on localhost on the default port. If you need to connect somewhere else, change the source code.
To test it: mythfrontend mythmpd
To install in mythtv, add the following to /usr/share/mythtv/library.xml:
<button> <type>MPD_MYTH</type> <text>MythMPD</text> <action>PLUGIN mythmpd</action> </button>
I usually add a key binding for the "MythMPD" jump point and configure my remote to use that jump point.
See this post.
Er, this is a hack that I wittled up one day for my own use. I'm not a C programmer, so I dismiss any eyebrows raised at the quality of the code.
MythMPD is distributed under the GNU GENERAL PUBLIC LICENSE version 3, and where noted with the @license tag, the LESSER GENERAL PUBLIC LICENSE version 3. Please see http://www.gnu.org for details and the specific text of the license.