Protected
Enterprise scala actors: introducing the Akka framework
Pluggable Persistent Transactors with Akka
MongoDB for Akka Persistence
No Comet, Hacking with WebSocket and Akka
Using Cassandra with Scala and Akka
Akka: Simpler Scalability, Fault-Tolerance, Concurrency & Remoting through Actors
Jonas Boner on the Akka framework, Scala, and highly scalable applications

Articles & Presentations
Articles
Enterprise scala actors: introducing the Akka framework
Pluggable Persistent Transactors with Akka
MongoDB for Akka Persistence
No Comet, Hacking with WebSocket and Akka
Using Cassandra with Scala and Akka
Presentations
Akka: Simpler Scalability, Fault-Tolerance, Concurrency & Remoting through Actors
Podcasts
Jonas Boner on the Akka framework, Scala, and highly scalable applications