Functional programming in the mainstream

Here is a bit from Ted Neward, commenting on the outcome of his predictions for 2007:

THEN: Languages: Interest in functional-object hybrid languages will grow. Scala, Jaskell, F#, and others not-yet-invented will start to capture developers' attention, particularly when they hear the part about functional languages being easier to use in multi-core systems because it encourages immutable objects and discourages side effects (meaning we don't have to worry nearly so much about writing thread-safe code). NOW: It grew, and it continues to grow. New languages in general are being released (see Clojure, Jaskell, dynalang, and others), and lots of them are incorporating functional language concepts. If you've never programmed in Haskell, now's a good time to learn, because those concepts and syntax are fast making their way towards you...