And, for those desiring augmentation/enhancement of their own self-directed text-based learning of OTP and Erlang, two of the "Erlang and OTP in Action" authors, Martin Logan and Eric Merrit, with Jordan Wilberding and Ram C Singh (full disclosure: that's me), teach ErlangCamp, an intensive two-day course in building large-scale Erlang applications using OTP.
The class is suitable for those with some experience with programming, though Erlang expertise is not required. It is based on the book, but structured differently. The class starts with the teaching of the essential aspects of Erlang required for one to become functional with OTP, then moves quickly into an introduction of OTP. The remainder of the class is spent building on these foundational Erlang and OTP concepts.
Two ErlangCamps are in the planning for this year. One will likely be in the Europe (date/location TBD), and the other in the US, targeting "Music City", Nashville, TN, in October. If interested, monitor the ErlangCamp website (http://www.erlangcamp.com), which will be updated with details, as we lock them down.