A while back I created the Django Hackathon Starter [1] which was aimed to be a general boilerplate providing several out-of-the box OAuth hooks and API examples. It hasn't been updated recently, but was a pretty fun project to work on at the time.
As of now, Django Hackathon Starter now includes Facebook login, Facebook API example, Google+ Login and Google+ API example, and lastly Dropbox Login and Dropbox API example.
We currently have plans for these features. I agree, these methods are key components that one would expect when it comes to signin methods - sign in with Facebook is just about everywhere nowadays.
[1] https://github.com/DrkSephy/django-hackathon-starter