I had the chance of meeting Ze Frank (web, twitter) a couple of times, back in 2010 and 2011. Last time I interviewed him on some of his public speaking tips (read article). Now, he just published this hilarious but also very practical video that distills in a “how to” [non blinking] style his best advice. I will surely take these into account when I prepare for my next speech.
By the way, Ze suggests that you don’t imagine that your audience is naked to fight your nervousness, a quite popular tip for first time speakers.
(and why not, maybe even email this video to your event’s speakers)