José Valim explains the ideas behind Elixir, a new programming language for the Erlang VM. Also: concurrency, handling iteration with Iteratees and other approaches, and much more.
Nathan Marz explains the ideas behind the Lambda Architecture and how it combines the strengths of both batch and realtime processing as well as immutability. Also: Storm, Clojure, and much more.
Miles Sabin explains dependent typing in Scala, the Shapeless project that demonstrates these concepts, static typing improvements in Scala and Scala Macros.
Lance Walton discusses Scala in the enterprise, educating developers in functional programming and whether Scala's binary compatibility issues between releases are a problem, and much more.