There are a number of helpful questions related to AngularFire authentication.
Basic user authentication with records in AngularFire is a pretty good one for starters.
Anant Narayanan's presentation in combination with the code at https://github.com/anantn/firetube also has alot of good teaser info.
Reading through the documentation at angularfire.com is um, AngularFire seed is helpful..
Unfortunately, I still get the feeling that I'm wandering through a foreign land with a handful of tourist info-booth maps. Please suggest any direct and complete introductions or tutorials to the land and culture of Angular + Firebase? More specifically, content that connects stuff to authenticated users in some meaningful way.