Have you given a lot of talks? If not, I'd plan a 5-7 minute talk, which will actually take 10-15 minutes. Mark each of your points as either 1-minute or 2-minutes. If this was already obvious or habit, awesome :-)
I plan on practicing it out loud a couple of times at least, to improve fluidity and check the length. If anything I find I tend to talk too fast, not too slow :).
Next week I'm going to be doing a 10-15 minute presentation on Friendly AI to a local group of programmers. They're already familiar with concepts such as the singularity. My basic plan is to cover what FAI is, why it's important, and why it's a hard problem, based on the material on this site.
Does anyone have any specific suggestions of things that should be included, questions that I might need to answer, etc?