i composed a piece of music for Widelands. You can get it here: http://www.speedshare.org/download.php?id=58F853C413 The 'source-code' (midi-file) is here: http://www.speedshare.org/download.php?id=011CDD2013
If you like it, just tell me, then i may make more (if i have enough time). Feel free to publish it with Widelands under GPL.
If needed i can also upload the cubase-'source'.