To get you started, have a look at the source for clojars and briancarpers cow-blog.
http://github.com/ato/clojars-web http://github.com/briancarper/cow-blog
Brian Carper has a load of information about using compojure on his site (http://briancarper.net). In particular interest are:
compojure to the rescue: http://briancarper.net/blog/clojure-and-compojure-to-the-res...
deploying clojure sites http://briancarper.net/blog/deploying-clojure-websites