Learning Resources

General

https://angular.io/styleguide - The official Angular2 for TypeScript Style Guide
https://angular.io/docs/ts/latest/ - The official documentation for Angular 2 (with TypeScript). Includes a "5-min quick start", "step-by-step guide" and official API docs
https://github.com/angular/angular - The official codebase for Angular 2. Where to submit issues, follow the code progression, etc.
http://angularjs.blogspot.com/ - The Angular blog, which contains updates and blog posts from the Angular team.
https://groups.google.com/forum/#!forum/angular - Google Group for Angular 1 or 2 discussions.
https://angularair.com/ - A live video podcast all about Angular
https://www.npmjs.com/package/npm-check-updates - A npm package for dependency management
Scotch.io has a bunch of articles on various angular 2 topics

http://www.typescriptlang.org/ - The official documentation for the TypeScript language. Includes links to sample code, as well as a live in-browser editor/samples.
See also the TypeScript Guidelines on the Prototype's wiki

RxJS is used as part of angular 2 to deal with asynchronous data. A good grasp of RxJS is essential to write robust angular 2 code.

A general introduction to Reactive Programming
There are a bunch of resources on RxJS’ github
Decision trees to find which operator to use when creating new sequences or using existing sequences → these are very useful during development

Universal is the angular sub-project that allows for angular apps to be rendered server-side

Here‘s a high level document explaining it
There are some videos on their github page
William Stanley Welling has a test project to experiment with Angular Universal.

Redux is a set of design-patterns to manage state in a javascript application.

The concepts are explained clearly, though independently from angular in the main redux docs
There is also a great free video course on egghead
@ngrx is an implementation of Redux for Angular 2 using RxJS
Ducks is a way to structure redux applications to keep them as modular as possible that works well in practice.