Wikipedia and broken window syndrome
Several very highly qualified bloggers Mike of techdirt , Joi Ito , Cory Doctorow recently lambasted Al Fastoldt’s article where he says that a librarian said the Wikipedia is not authoritative and that it should not be used as a knowledge source.
Much more than a proof of concept, I think the wikipedia is fascinating as on the surface it does appear a very fragile way to generate knowledge. Allowing anyone, anywhere to edit and alter an article page on something or create new knowledge appropriate is a revolutionary idea and I can definitely see why a librarian would have a problem with this.