REBOL is a messaging language. Its main purpose is to provide
a better approach to distributed computing and communication.
I can not refrain from making the connection with Erlang while thinking that the concept is quite different even if the intention is the same in the words. To see later.
REBOL introduces the concept of dialecting
Dialecting is very interesting. I find this a paper, Language Oriented Programming of M. P. Ward about it. Have to read it.
REBOL implementations are intentionally kept very small
This is the aspect that I think keeps the whole very compact. I hope it's extensible, though.
The global configuration of a proxy and an SMTP is very useful in a company or a shcool. We are constantly annoyed by this kind (false) security.