I gave my ApacheCon talk today at work. Thing is, I wasn't expecting to do it today. So I was asked to do it and it went well. My fellow co-workers tried hard to emulate That Guy and This Guy (yes, on purpose), and I had fun thwarting them.
I flew through the material kind of quickly though, 47 minutes on a 1 hour talk. Of course, my co-workers know this material. Well, the programmers at least.