He was one of the founders of Msytery Science Theater 3000 but left the show, citing creative differences, before the end of its run. He has recently started a similar film-ripping operation called Cinematic Titanic. Slashdot readers proposed several questions, here's Joel's answers.
http://interviews.slashdot.org/article.pl?sid=08/01/25/1457218
http://interviews.slashdot.org/article.pl?sid=08/01/25/1457218