I am one of the “various presenters” in the Confreaks video of the lightning talks available here. Scroll to around 18:15 for my talk, “You Should Write a Ruby Gem” (but really, you should watch them all!). RubyConf was an awesome time, and attending (and speaking in) the lightning talks was one of the highlights of the conference for me. Be sure to check the video out, if you haven’t already!