Two part interview from about a few months back:
http://vimeo.com/6784645
http://vimeo.com/6889614

Plus a review + photos of the Whidbey show by Firehead Michael Dare:
http://dareland.blogspot.com/2010/01/as-smart-as-comedy-gets-firesign.html

Hello Seeker! Now don't feel alone here in the
New Age because there's a seeker born every minute.
  -- Firesign Theatre