Yay real excited about this! I'm currently a Backbone.js junkie but I'm looking for something more opinionated and less boilerplatey. Nice to see Ember.js maturing. Let's see some more documentation!
I'm in the same boat. While I definitely appreciate Backbone for what it tries to be (and it excels at that, in my experience), I find myself somewhat unsure at times if I'm deviating too much from best practices. Not that I need someone to hold my hand, but a lot of times when using backbone for my non-trivial app, I got the feeling I was reinventing a wheel.
For example: view clean-up (the zombie problem), model relations, alternative transport layers (socket.io), and view nesting.
I did however often greatly appreciate the elegance and simplicity of Backbone's source code and design, as well as for introducing me to the fantastic Underscore library, which I now make much use of both client-side as well as in Node.
I think I'll wait until the first 1.x release to consider porting my app over, or perhaps not depending on how Backbone 1.0 turns out.
