Ember is on the list of things where I think the main tutorials are far too shallow to really get a sense of how to use it. I wish there was a more full-blown REST-API backed tutorial with complex nested views and such.

Really it's not Ember, I guess, so much as it is the notion that a todo list app exposes you to the key things you actually want to know about a particular front end framework. If you think about it, it's a silly notion.