In that list, Clojure is the language that excites me the most. It's a modern, pragmatic Lisp ready for the multiprocessor world. You can do a lot worse than trying it out if you haven't already.
Lot of people claim that STM in Clojure is the big reason to use it. To me it's been a lot simpler: a) I want some macros to use for JVM-based projects b) I like using Emacs + SLIME (it's the best development environment, period). Unfortunately the noise of Rails fanboys migrating to it with their usual laundry list of complaints ("no IDE support", "no good web framework") is annoying. I have nothing against Ruby in…
A web framework is still useful, even if many people assess a language purely in terms of it.