Please note: this is an ancient question with ancient answers. Most of the linked apps are now unmaintained. These days, most people seem to use django-allauth or python-social-auth. I'll leave the original question intact below for posterity's sake.
There are at least half a dozen Django apps that provide OpenID authentication for Django:
I played around with a couple of them. Simon Willison's django-openid made a good impression, but as he is at the forefront of trendsetting in Djangoland, I sometimes have difficulties wrapping my head around his trends (e.g. the whole dynamic urlpatterns system in django-openid). What's more, I couldn't get login to work with Google.
django-authopenid made a good impression, and it seems to have good integration with django-registration. django-socialauth and django-socialregistration have support for Twitter and Facebook, which is definitely a plus. Who knows if and when Facebook will start to be an OpenID provider...? socialauth seems to have its share of problems, though.
So, what is the best OpenID app out there? Please share any positive (and negative) experience. Thanks!
The one that has proven to work best for me, and which seems most up-to-date is the one over at launchpad.
It integrated seamlessly with my application that already utilizes the django.auth module.
https://launchpad.net/django-openid-auth
To get a copy run:
bzr branch lp:django-openid-auth
Or install it via PyPI
pip install django-openid-auth