In this release, we've replaced WCF internally with raw TCP, done a lot of "asyncification" of our internal code, added support for C# actor methods with dynamic actor state, started some ETW logging on actors, and provided an ActorAnalyzer tool for examining the logs of any actor.
A new section has been added to "ActorFx Basics" doc describing the use of dynamic actor state, and a new section has been added to the "Actor Runtime Manager" doc describing the use of the ActorAnalyzer tool.
The code is still Alpha quality.
The ActorApplication.zip download is a VS2012 project template. The "Actor Runtime Manager" doc has information regarding what you need to do with this template in order to make use of it.