I came across this Facebook app, Our Song, a while ago on one of my Swedish friend’s Facebook page. I liked but it was in Swedish, so forgot about it until seeing it on Adverblog recently. In short, the app allows you to send a friend a photo montage from tagged Facebook photos of you and said friend accompanied by music that you selected either from a pre-selected list or from the music library of this Swedish online music store. Just awesome. See the demo.