I haaaaate public speaking... I'm totally weird about it, too.
In 11th grade, I passed out during an Academic Decathlon speech...infront of a crowd of *3*. Like, nearly hit the floor, had to be dragged out of the room and into the hall to recover for quite some time passed out. Not fun.
Just last month, my Business Stat teacher (who likes to torture me) made me explain a problem on the exam to the class. I had to get up infront of the class and write the problem out while he was explaining the answers to the rest of the exam (that took a good 15 minutes), then another 5 minutes to explain. He also makes me do role call stuff and help hand out exams (both standing infront of a class of 200.) That doesn't bother me one bit. What does bother me is being singled out constantly... but I guess that's what I get for being 'the smart kid'. I've also sang solo a few times... just a short line (infront of a crowd of about 1000) and an entire song by myself (that was a crowd of about 400.) Not a problem. Both of those were back when I was 13.
I don't know if the Business Stat stuff doesn't bother me because I'm getting better, or if I just handle large crowds better than small crowds. Still, the idea of speaking in public, especially a prepared speech (maybe that's what it is?) gives me chills. I hope I'm able to overcome whatever it is just like everyone else has!