FWIW, my teenaged son just used the American Pie thread in a school language arts project on the "60's" (teacher is stretching the era to include the early 1970's). The thread included annotations to the lyrics, a possible origin story, and a possible rebuttal to part of same. I'm no good with blue clicky's yet, but the last entry was 30-April-2000.
I don't know which one you'd like to choose, but you also might consider some of the threads that hold some of the oral history of folk music in (mostly) North America. Lee Haggerty andEd McCurdy obituaries come to mind.
Good luck with this.