Sorry, I didn't mean to say that they didn't have libraries available in other languages (they clearly state that they do in the blog post) - I was mostly just commenting on the tone of the post and how it might ostracize certain developer communities.
If they already have support for Ruby, PHP, Java, Objective-C, and server-side Javascript, then a post that claims Haskell and Clojure are the languages that "really matter" can probably be safely assumed to be a joke.
