Jeremy McLeod

If this has come in handy, I sure wouldn't mind an upvote... just sayin'

Sure enough. Good catch; I've updated the gist.

I had some problems with my hosting so the line image wasn't showing up for a while, but the issue has been resolved and the fiddle should appear properly now.

Also I should mention that this code was written for Marionette while it was in a very early RC state, and I know things like EventBinder have been removed or replaced with Backbone's new event system, so it may require a little tweaking.

I've updated the gist. The only change I made was to the SuperVent.js file - immediately before trying to extend the Marionette.EventAggregator class, I just added the line

Marionette.EventAggregator.extend = Backbone.Model.extend;

Wow, that looks almost exactly like Step, just with different nomenclature.
https://github.com/creationix/step