I thought that the song that Paul McCartney performed at the end of the NYC event for Rescue workers over the w/end had a definite folk feel to it. It was short, and he had the entire audience of many thousands singing it with him in no time flat, and I could easily imagine hundreds of verses being added. (I don't know name of it, but chorus was just "Freedom,/ Freedom,/ I will fight/ for the right/ to live in Freedom".) Folk music can't die; look at the threads about childrens' songs. People are always going to sing.