Here's a screencast of using Akka in the context of Play. Akka's motto is, "Simpler Scalability, Fault-Tolerance, Concurrency & Remoting through Actors". The screencast shows how to implement a hit counter using STM (software transactional memory). It's acting as a library within the context of a Play application. That surprises me (in a good way) since I was afraid you'd have to run Akka out of process. The screencast shows how STM is able to maintain correct results under a heavy, concurrent load. It looks pretty painless. There's another screencast showing how to do the same thing with actors, and then another that shows how to do the same thing for a cluster of servers using remote actors.
In his keynote at PyCon, Eben Upton, the Executive Director of the Rasberry Pi Foundation, mentioned that not only has Minecraft been ported to the Rasberry Pi, but you can even control it with Python . Since four of my kids are avid Minecraft fans, I figured this might be a good time to teach them to program using Python. So I started yesterday with the goal of programming something cool for Minecraft and then showing it off at the San Francisco Python Meetup in the evening. The first problem that I faced was that I didn't have a Rasberry Pi. You can't hack Minecraft by just installing the Minecraft client. Speaking of which, I didn't have the Minecraft client installed either ;) My kids always play it on their Nexus 7s. I found an open source Minecraft server called Bukkit that "provides the means to extend the popular Minecraft multiplayer server." Then I found a plugin called RaspberryJuice that implements a subset of the Minecraft Pi modding API for B