Have you heard "Give me Immortality", or any of the later Firesign? I saw them on a PBS special last year performing an albumn. Those guys never stop!
One of them, Proctor, I think, was also on some NOVA special or some such, at a national mystery writer's event where they did a radio show modeled on one of the books. What a hoot, these guys really miss radio!
I was VERY pleasantly surprised when “Give Me Immortality” came out in ‘99 — I think it’s one of their best.