I’m a little late in mentioning this, but I recently spoke at RailsconfEurope about Rails Refactoring. It was a tutorial talk, and I thought that it went very well. I think the presentation is up on O’Reilly somewhere; I’ll link if I can find it.
Overall, the conference was really good. Berlin is an amazing city and the majority of the talks were really good. Of special note were the ones by Dr. Nic, Topfunky, and Evan Phoenix. Their talks about ruby magic, css generation, and rubinius were really well done.