I don't have a problem with public speaking, so no gunpoint would be necessary.
I did a lot of stage work, acting and singing when I was in high school, but tapered off in college. I never quite got what the whole stage fright thing was about ... you go out, you do what you've been practicing for the last n months, and for the most part, nobody really notices if you screw up — learning to cover for screwing up is also part of the process.
My job essentially involves a lot of small group public speaking ... nearly all off the cuff stuff, although there is a certain framework provided by the mental health procedures act.
I haven't presented at conferences, but would be comfortable doing so if I had the opportunity. I have gotten into longish discussions with presenters in smaller (40-50 people) sessions without any hesitation.