Swarm - Concurrency with Scala Continuations - Scala 2.8 sounds increasingly interesting. Portable continuations are essentially type-safe execution states bundled and serialized, so that they can be sent over lines. Highly interesting for creating distributed applications - e.g. saving the session in the browser instead of in the database - but certainly there are also one or two security issues lurking there (serialized objects can also be deserialized and manipulated externally). Exciting to see what could come in that area.