dotCSS was the first CSS conference I have attended. Unfortunately the conference had no WiFi which would be nice for the people coming from outside of France. The location was a cramped and beautiful theater (see photos by Andrey). I also attended the dotJS conference.
Daniel Eden Recommend
(S)CSS at Dropbox
Slides not available. A nice talk about the challenges Dropbox had with a large CSS codebase. He talks about some of the problems. I would like to hear a lot more about how to attack the problems or what Dropbox did about them but still an interesting talk.