This is an old article but still relevant, especially since Clojure allows co-mingling Java and Clojure (Lisp) code. I find Clojure especially useful on my own projects because there are no problems finding developers or getting customer approval for using a very nice, but niche language.

I still like (J)Ruby a lot but the runtime performance of Clojure is better and the two languages seem, to me, to be equally "agile" - both are a pleasure to code in.