Once I found that Nick was blogging, and found that I can catch up with presentations, that I have missed!, I gave up even thinking about writing. He did write a lot of very good material, I spent a lot of time reading his blog already!
Once you read his articles, you will feel that you have actually been in the presentation.
Here are the article;
RailsConf 2007 Opening Keynote: David Heinemeier Hansson
RailsConf 2007: Evan Weaver: Going Off Grid
RailsConf 2007: Saturday Morning Keynotes
RailsConf 2007: Bradley Taylor: Virtual Clusters
RailsConf 2007: Chris Wanstrath: Kickin' Ass with Cache-fu