The O'Reilly guide

Interactive map/reduce function tutorial
_ http://labs.mudynamics.com/wp-content/uploads/2009/04/icouch.html

Built-in couch.js jQuery plugin
_ http://www.couchone.com/page/library-couch-js

HTTP API reference
_ http://wiki.apache.org/couchdb/Reference

Manage Couch design documents with CouchApp
_ http://couchapp.org/page/what-is-couchapp

Mustache (templating) documentation
_ http://mustache.github.com/mustache.5.html