Started on Ember.js testing guide

I've started writing a guide to help people get started writing tests around their Ember.js applications. Since this is such a hot issue, and one I have only scratched the surface with, I want to write this in the open so I can get feedback early and often. Please feel free to comment if you see something blatently incorrect, if something just doesn't look right or if you just have questions. Can we leave this open as I work on it and merge/close it once we get some agreement that it's ready?