Does anyone know of any open-source projects out there using a similar stack? I'm particularly interested in learning more about client-side view rendering with Backbone and Mustache... server side can be any of Node, Rails or Django.
If you want to look a couple really-small examples I have a couple apps on github I used for learning backbone.js/coffeescript. They both use the underscore.js template engine.
https://github.com/jwarzech/realtime_hn Backend is sinatra, takes a HN story url and polls the comments in reverse chronological order.
https://github.com/jwarzech/inspire_board Backend is rails, polls images from dribbble and lets you save your favorites.
That lets you use existing libraries (Devise, etc.) for the authentication and once that's out of the way, you can go have "fun" with coffeescript and mustache. :)