I had an hour yesterday and another one today on the train and I wrote a small plugins to make gmpc integrate in the ubuntu SoundMenu. There is a small bug in SoundMenu not showing the complete name, I reported today and is fixed upstream (https://bugs.launchpad.net/bugs/744142). You can get a trail version here:  http://download.sarine.nl/gmpc-appindicator-0.0.95.tar.gz. I read more »