Yah, maybe just add links at bottom: LYAH, Applicative Functor wiki page. Or maybe mention one syntax feature, IO's and do-blocks, and say "return" and "<-" just kick things into and out of IO's, loosely speaking. Just don't say IO's are like burritos ;-}

You could also say, for anybody that's looked at lisps, *ML, F#, scala, erlang, the syntax isn't too bad, and for anybody that knows rails, they'll recognize the same REST'y MVC layers/abstractions. I gather the target audience is folks using dynamically typed languages.