Actually Perl 6 is becoming that ;-)

It's planned that Perl 6 will get a concurrency model that was protoyped with Haskell, and it has many features that are typically found in functional languages, like Currying, lazy lists, continuations (think gather ... take) and many more.

But it supports so many other paradigms (for example object-oriented and logic programming (think of regexes...)) that you won't be forced to use it as a functional language. And it will be "hidden" with nice syntax ;-).

Sorry for the digression, couldn't resist ;)