Here's my presentation from the O'Reilly Emerging Technology Conference, "From the Margin of the Writable Web" in your choice of Powerpoint [112 KB] or HTML. Enjoy! And thanks again to everyone who took the time to offer suggestions. I'll try to post all of those when I get a chance later this week.
Update: here are the collaborative notes taken during my talk by some folks in the audience using Hydra. And here are Cory Doctorow's notes from the talk.