Here's a list of resources that have been helpful for me in getting acquainted with Ember.js, in no particular order. Ember is relatively young and changing really fast, so I found that searching for answers on Google and Stack Overflow was not quite as easy as it is with Rails. Try to stick with resources that have been written in the past few months. Look at the older stuff too but remember that things have likely changed.
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Rock and Roll with Ember.js is a great tutorial and explanation of what's going on in Ember http://balinterdi.com/rock-and-roll-with-emberjs/
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The official Ember guides. The guides are useful for a general overview of what's going on in Ember, and the API docs will help you get familiar with the methods that are available to you. http://guides.emberjs.com/v2.0.0/