I concur, this is a really good course. I've since switched to Clojure but I still think that I gained a lot from working through this course. It is a really great introduction into functional programming paradigms, and well worth it even if you don't plan to continue using Scala.
Any way to see when this was created? Do these ipython notebooks log create/change events? Just curious to see if this was a recent creation or just a recent discovery...
Most talks will be 30 minutes, some will be 45. We don't know which are which yet; that'll come when we publish the actual schedule in the next couple weeks.