I also tried to test the application using BDD with ScrewUnit & BlueRidge. With this solution, you can test your controllers, views & models in your browser. Most of tests can also be automated using Rhino. Have a look at the testRoute method in the sammy.test.js plugin. There are only a few things at the moment, but you've got the idea.
This app is also using MongoDB & MongoID for the storage.
Copyright © 2010 Anthony Heukmes, released under the MIT license
My Twitter account : twitter.com/2dc
My company : intotheweb.be