The post is a little dense, I'll try to summarize: it's basically Backbone split into NPM modules so you can pick & choose. For instance, you want Backbone's collections, but don't want the whole Backbone library, so you `npm install ampersand-collection`. They've setup a registry of recommended modules [1] and you compile with browserify.
Good for folks that are used to the node modules philosophy - Seems like a logical extension of the browserify effort (bringing Backbone into the frontend modules system). I dig it.