SNS Bank that I announced earlier, at the Dutch Linux World 2008 in Utrecht. The turnout was around 50-60 persons and the location was big enough for 200 or more. Kind of a strange feeling that you are talking to an empty room, but there was plenty of interaction and questions with the public throughout the session.
After the session I was approached by a number of persons asking to be provided with a copy of the presentation. I understood that they would all be put online, but I can't find anything about it on the Linux World 2008 site. Until it shows up somewhere else, you can get the PDF of the presentation here.