http://www.boingboing.net/2006/02/08/songbird_the_open_so.html
A new open-source media player/manager, and the UI looks (at first glance) almost exactly like PMM's.
Crazy.. your right that looks exactly like PMM.. heh. Wonder if some phatnoise / former phatnoise folk worked on that?
And it begs the questions; Why would someone clone an interface that is inherently sh*t, and, is it possible that two different people, at different times, came up with the same crappy interface!! ;)