YES PLEASE ASK ME! I had the world's worst public speaking phobia until recently. I've posted about it here and been close to giving up on my career because of it. I used to get tunnel vision and crazy fast heartbeat just reading out loud in front of a small group of colleages. I felt like I was disabled by it, truly.
Any time when I knew in advance that I had to do it, I used beta blockers, which worked well, until I got pregnant! I didn't want to risk the baby's health, so looked into hypnotherapy.
I think it's very important to find the right therapist. Mine has been practicing for maybe twenty years and has a master's in CBT. She uses a variety of different techniques to 'reprogramme' the neural pathways, such as eye-movement therapy and 'tapping'. However, I think the most important thing she does, which many others don't (I've tried and failed to address the issue with a couple of duds in the past) is that she records the session on an MP3 for you to listen to every night as you fall asleep.
Since seeing her (about five times, at about £85 a pop - I probably would have been fine with less, but I was very nervous), I have done no less than SIX presentations in one month, three of which were at high-profile conferences, to a very big and knowledgeable audience. If anyone had suggested I do that six months ago, I would've laughed (bitterly) in their face.
If you're in the London area, send me a pm and I will give your her details. She's really amazing. If she can fix me, she can fix anyone.