The source code is a treasure trove for those looking for an example of a larger Backbone.js application with a Rails backend and Faye for push notifications to the browser.
Thanks - Akash Manhor (https://twitter.com/hashnuke) made both of those decisions early on in Kandan's life. There have been challenges around both, but overall it's worked out very well - in fact, the faye interface opens up some really interesting possibilities. We'll have some examples of this soon.