Dave certainly is ranked near the top of my list of speakers to listen to.
I would have liked to see more rails examples. That's the kind of development we do so that would have been the most interesting to our crowd.
I've done one simple Rails app (demo at [link|http://onestepback.org:3030|http://onestepback.org:3030]). It took a couple of evenings to throw together. Source code is in the CVS repository at [link|http://rubyforge.org/projects/storycards|http://rubyforge.org/projects/storycards] (however, keep in mind this was my first Rails project and I certainly did some things the hard way).
Rails is certainly getting a lot of attention right now. David Heinemeier Hansson's talk at [link|http://www.rubycentral.org/conference/|RubyConf(2004)] was one of the most anticipated talk of the conference.