The official Google Group for Angular.
Ranked in these QuestionsQuestion Ranking
Pro Helps stay up to date with latest news
This is the main discussion board regarding AngularJS, as such it contains the newest information, often from the AngularJS developers themselves.
Pro Community support
Ask questions, participate in discussions, etc..
Con No tutorials
This isn't specifically set up to be a learning resource that follows a progression.
It's a group, so it's discussions on Angular and questions/answers.