At the Twitter Engineering blog. A laundry list of improvements, noticeable among them: dumping the client-side rendering for server-side rendering, dumping the hashbang, and CommonJS modules delivered via AMD.
The “server-side rendering as faster” bit seems to be getting a lot of circulation—without a doubt because it’s coming at a time when so many folks are pushing “purely client-side” UIs. There’s a place for both, but it was nice to see such a prominent organization come out to discuss this. (And in this way.)