This is example code for deploying a Clojure/Compojure web app to Google App Engine. I document my experiences while playing around with this at http://compojureongae.posterous.com/ and keep the source code here.
It is a work in progress, right now it covers basic access to the GAE datastore and usage of the Users API
I hope you may find some of this useful. If you have questions or suggestions, please leave a comment at the site mentioned above.