Rubyconf 2013 presentation on Opal - Ruby in the browser. A New Hope for Ruby Programmers. Actual presentation has a ton of sound and video. I'll post the confreaks link when it's available.
Update 2: link with sound, then a link to the rest of the video - https://vimeo.com/82573680
Update 1: Confreaks link. http://confreaks.com/videos/2904-rubyconf2013-opal-a-new-hope-for-ruby-programmers - They had to mute the star wars music coz youtube would reject all the sound. I'll see what can be done about that
Clipping is a handy way to collect important slides you want to go back to later.