Django OpenID Provider application acts as OpenID provider (in lame terms Server) for your django.contrib.auth accounts.
If you have your own Django powered website you might want to use your admin account to authenticate on other sites like stackoverflow or even in other django websites you manage (with django_openid_auth for example).
Reasons to do that:
Code and issue tracker is hosted on bitbucket.org/romke/django_openid_provider/