These ebuilds come from http://mpd.wikia.com/wiki/Repositories#Experimental_Gentoo_Overlay.
If you have some problems, go to the official site first.
Audio-MPD : Audio::MPD is a Perl module for interfacing MPD through perl scripts. ( http://search.cpan.org/~jquelin/Audio-MPD/ )
Audio-MPD-Common : a bunch of common helper classes for mpd ( http://search.cpan.org/~jquelin/Audio-MPD-Common/ )
Getopt-Euclid : Executable Uniform Command-Line Interface Descriptions ( http://search.cpan.org/~kgalinsky/Getopt-Euclid )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a mpd
For Paludis use this rsync : rsync://gentoo.zugaina.org/mpd-portage
If you have a problem : ycarus(-at-)zugaina.org
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