Dedicated facebook authentication for Django that does it via the backend and not javascript. Has lots of tests and a trivial-to-setup test project with working code.
The blog entry that started it all:
http://pydanny.blogspot.com/2011/01/what-i-want-for-django-facebook-connect.html
Full Documentation:
http://django-la-facebook.readthedocs.org/en/latest/index.html
Note: This is the old development fork. Work is now happening at:
https://github.com/cartwheelweb/django-la-facebook