I agree that 4clojure.com seems an easier way to get started. However, if you're already setup with Clojure on your machine, using clojurekoans.com has the adva

I agree that 4clojure.com seems an easier way to get started. However, if you're already setup with Clojure on your machine, using clojurekoans.com has the advantage of allowing you to work in your editor of choice.