Current song from Last.fm in status message
The attached patch to Gajim 0.11.2 allows to specify a Last.fm username in the preferences.
When enabled, the new functionnality will regularly (but not too often) poll the Last.fm website to keep the status message updated to the last scrobbled (if not too long ago) song.
Due to various delays in the chain (scrobbling/Last.fm update/polling), a variable delay (of the order of the minute) might be experienced between the actual change in the song and the update of the status message.
This is sufficiently low, though, to provide a fine enough information about the current musical environment (: