I presented this:
I gave a talk last Wednesday at "API wars", a Web2Ireland event on APIs before the Facebook Developer Garage. It seemed to go down very well. I think the whole thing was filmed, so hopefully all the talks will be available online. It was my first talk in front of a sizeable audience and it went very well. My green-on-black Terminal screenshots didn't appear on the big screens, so with apologies to _Why, I left the stage to show the crowd how the Ruby Twitter gem works. A lot of fun.
I've made the slides available as a PDF.