It's great to see an open sourced Ember.js project on the front page. I've spend most of the last year working with, around, and on top it. But, and this is a but of serious hesitation, why would you use Ember.js for a blog like this?
I'm nearly positive the answer is just "to learn Ember" - in which case, great!
To everyone else: don't start using a JS MVC framework for your real projects without seriously justifying their use in the first place. They should absolutely not be considered part of a default app stack. You will go through so much pain in doing so, and that pain needs to explain itself, in the concrete terms of the project requirements.