Scala’s actors (and remote actors) implement a pretty good chunk of erlang-like processes, process management, and message passing. And the performance on an unmodified jvm is beyond impressive. I guess it makes sense since event-oriented java library implementations have done the same. Scala takes that somewhat clumsy approach (in java) and wraps it up in a much nicer language and a richer erlang-like library.
I’m not ready to move away from my current favorite programming language anytime soon, but if I were, Scala would be a good candidate.