Poll: Which programming language do you plan on learning next? 18 years ago
Clojure, people! If you haven't yet checked out Rich Hickey's new functional lisp for concurrent programming on the JVM, then you're missing out on something really, really, mind-blowingly cool! I'm a Lispnik at heart, and I do most of my personal development in Common Lisp on SBCL, but I have to program a lot of Java code for my day job. Clojure has definitely caught my eye and is #1 on my list of next languages to learn.
Check it out: http://clojure.org