The Clojure webframework Compojure is dead easy to install and get running but I got stuck. Anyway it's working now and here are the steps I took:

Install Leiningen (as root)

cd /usr/local/bin/
wget http://github.com/technomancy/leiningen/raw/stable/bin/lein
chmod a+x lein

Setup Leningen and install Compojure (as user)

lein self-install

git clone git://github.com/weavejester/compojure.git
cd compojure
lein deps
lein jar
cp compojure.jar ~/.swank-clojure/
cp libs/* ~/.swank-clojure/

(~/.swank-clojure/ is inside my classpath because I use Emacs, replace that with the correct directory for your installation.)

Now a trial program straight from the Compojure homepage

(use 'compojure.core 'ring.adapter.jetty)

(defroutes main-routes
  (GET "/" []
    "<h1>Hello World</h1>")
  (ANY "*" []
    {:status 404, :body "<h1>Page not found</h1>"}))

(run-jetty main-routes {:port 8080})

Now browse to http://localhost:8080 and it should say "Hello World".

Cheers, Dave.