At the last Refresh Denver meeting, I talked about microformats. Rather than doing a slideshow presentation, I just wrote down and passed out 25 statements about microformats that I hoped would be interesting enough to drive discussion. It worked out well enough, I think. In hindsight, it probably would have been better to focus less on the abstract concepts and more on the specifics of how microformats work. But I definitely plan to use this kind of “25 statements” style for future talks, as it ends up being more flexible and more participatory than a typical presentation.