Seems neat, and the ugly parts, like \ in the strings for the templates, could be helped by CoffeeScript's syntax. I'm not wild about mixing markup and style into scripts, but it does keep things nice and self-contained and could be great for small projects.
On the other hand, I don't like getting an unsolicited message about the project just because I'm watching Backbone.js on GitHub. I was mostly indifferent to Agility.js before, now I have some dislike of it.
Agreed. This is the second time this has happened to me in the last few months. Using GitHub repo followers as a spam list is unacceptable and makes me immediately dislike the project that the spammer is trying to make known.
On the other hand, I don't like getting an unsolicited message about the project just because I'm watching Backbone.js on GitHub. I was mostly indifferent to Agility.js before, now I have some dislike of it.