I don't think it went as smoothly as the first either. Our first speaker was late, so I delayed the beginning rather than immediately swapping the 2nd speaker for the 1st. In the end it was getting to late so I did in the end, swap them. I really should have done it sooner. The delay ended up making the whole night go to late, which meant that there was a number of people who had to duck out before the 3rd speaker got completely underway - they missed a good talk.
The sound system really needs sorting out. The mikes worked fine when we tested them before hand but kept cutting out during questions and the like. The only solution I can figure for that is to work up a little set of guidelines for the speakers that includes getting them to repeat the questions.
And I really have to work on my introductions I think.