I gave my keynote presentation on the social and economic impact of digital identity to the JA-SIG 2007 Summer conference. JA=SIG promotes the development and use of open architectures in higher education. In addition to their semiannual conference, they also have several projects that members develop and contribute to.
The presentation went pretty well, I thought. There were probably about 150 people in the room. The PDF of my slides is available as well as a screencast demoing CardSpace and another screencast demoing OpenID which I showed in lieu of live demos. Neither is edited nor does either have sound. They are both simple, first-look style demos. Be warned: the screencasts are in Quicktime and both the screencasts and slide deck are large.