Three weeks ago I gave a 2.5-hour seminar on using data from my project. It was webcast to a couple dozen viewers, and it also got recorded.
I watched the whole thing last week and was generally pleased. I say "um" a lot, and I do some weird things with my hands from time to time, but overall I'm happy with it.
Which is good, because just today I finished adding it to our website for all the world of future users to see, and it would really suck to have to have it up there if I hated it...