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Hi, I'm the author of Fancy.
The erlang-style actor message passing hasn't been implemented yet. I'm workin on that though. Rubinius has a built-in Channel type, (similar to go) and an Actor library built on top of it. Once I get some of the other language features I'm currently working on done, I'll focus on that part of the language.
It just takes some time to get all these things finished, but it was always a goal to have this in the language.
Rubinius also has inter-vm communication which I will expose in Fancy as part of the language as well.
Another feature I'm currently working on is first-class pattern matching that preserves encapsulation (basically you have patterns as first-class values and matching an object against a pattern involves asking the object if it matches a given pattern - that way you don't break encapsulation).
Hope that explains some of your concerns.
You mean symbol literals? Ruby uses :foo but that would mix up with the keyword message syntax. So I took Lisp's syntax: 'foo =) Also, since you'll want to have syntax for message names as well, they need to be able to have colons in them, e.g. 'foo:bar:. Basically anything non-whitespace starting with a "'" is taken as a symbol literal.