For a popular topic, I do not see enough design discussions around Actors online. It could be difficult to learn about idioms or pitfalls without going deep into OTP or Akka. Off the top of my head I can think of only two interesting blogs:
- James Iry wrote a fascinating series on why Actors are not a silver bullet for all things concurrent. He is such a polished author you should read his posts even if you don't care much about Scala/actors.
- Somebody started recently a very informative blog with detailed examples of actor-based FP-style designs.