TiddlyCouch lets you serve a TiddlyWiki from CouchDB and read and write individual tiddlers to the database. Each tiddler is saved as a separate document. It consists of a couchapp and some TiddlyWiki plugins.
Option 1: replicate the demo database
Option 2: install couchapp, checkout this repository and run "./deploy URL-for-your-database"
This is the product of a quick hacking session with FND and is meant as a demo rather than a finished product.