Matz's Keynote from RubyConf-2008: Why Ruby?
rubyconf2008.confreaks.com
rubyconf2008.confreaks.com
This, I think, is the what makes Ruby such a bag of awesome. It has familiar syntax, and has borrowed a ton of great ideas from a variety of different languages to make it powerful. I've learned more from fooling around with Ruby (and the concepts it incorporates) than any CS class I've taken so far, props to Matz for making a fun language.