The Arizona Ontology Conference, organized by L. A. Paul, was held at a scenic dude ranch in Tucson. I learned some ontology and how to ride a horse. Here's the program and a complete list of participants. Summaries of papers can be found at Lemmings. My pictures are here.
Update: i've added about thirty more pics.
Update: Here are more pics and a post about Jonathan Schaffer's comments, from Dave Chalmers. Yet even more pics from the conference have been posted by Brian Fiala, Andy Egan, and Benjica (Hellie and Wilson).