If my e-mail is any indication, it's probably a task that most IT pros fear most--having to get up in front of a group of people and give a presentation. Even seasoned pros have that moment of panic before they step up to the mike. I've rounded up some great resources for improving your public speaking abilities. This one--Gain confidence in your presentations by following these tips--gives pointers on how to prepare yourself mentally and physically before the actual presentation, how to prepare your support materials and ways to keep your audience's attention during the presentation.Here's another resource from BusinessMouth.com--12 Ways to be a Confident Public Speaker--that offers some common sense ways to keep your confidence up.
And, if you're really feeling it, and decide to do professional speaking for a living, you might want to check this piece out.