I use Akka actors quite a bit at work, and I'm working on a new fun project that I'm trying to use Scalaz actors with, though I might give in and switch to Akka actors for that too. The built-in actors in the scala stdlib aren't all that great.
Scala is definitely my favorite language now, though I do wish the IDE tooling weren't so awful.
Oh really, what is the problem with Scala actor?
One problem I noticed with Eclipse IDE is that when refactoring a mixed project Java/Scala, the refactor name in scala code won't be apply to the Java part
EDIT : Scala stdlib Actor implements the same actor as Erlang right? I thought Erlang was great in that field.