Peter Bergman, a co-founder of the offbeat Los Angeles comedy troupe Firesign Theatre and host of the late-night KPFK-FM radio program, â€œRadio Free Oz,â€ has died. He was 72. Bergman died Friday, according to an announcement on the Firesign Theatre website. He had leukemia. http://latimesblogs.latimes.com/lanow/2012/03/firesign-theatres-peter-bergman-dies-at-72.html R.I.P. Funny man.