I don't know if this has been suggested or not however I would like to see a Quest or C-Store Item that would grant the player this flute in game which would play the folk melody in game... here's a link for a little more info about the flute I'm not sure if the history it represents is 100% accurate but close enough... if has an attached sound file of Picard playing the melody...
http://memory-alpha.org/wiki/Ressikan_flute
I know it doesn't serve a practical purpose but is something nice to have.