I just uploaded the slides from my Functional Programming in Ruby talk, given at the Pgh.rb in November.

The source is available on Github, and you can view the slides here, or view them them below. There is a recording of the talk, thanks to Corey Purcell.

On a semi-unrelated note, since reveal.js presentations are just HTML, pushing the raw repository to a gh-pages branch makes it publicly viewable. Which is awesome.