This past weekend was the second CapitalCamp here in DC, and I wound up doing a session on Friday morning. I was one of the organizers of the event, but submitted two sessions early on (mostly to start filling up the Proposed Sessions list). When it became clear that we had a ton of great session proposals (and I was going to have my hands full all weekend), I withdrew my proposals.
But, a speaker had to cancel his session a few days before the camp, and since I had previously done this talk at the DC PHP user group back in November, I was asked if I could fill the slot by doing it again. I think it worked out well: I've been asked by a lot of people who couldn't make it back in November if there was a video available, but at the time, I didn't really know how to use Keynote and failed to record it. This open timeslot gave me a chance to record a video, and to update some of the content of the talk.
In any case, I think it went pretty well. The audio peters out near the end: the Q&A became more of a discussion, which was great at the time but didn't get picked up by the mic.