Depends on how easily it is to integrate into your project. For instance, for Django applications, there's django-openid-auth (see http://blogs.gnome.org/james

Depends on how easily it is to integrate into your project. For instance, for Django applications, there's django-openid-auth (see http://blogs.gnome.org/jamesh/2009/04/14/django-openid-auth/ http://blogs.gnome.org/jamesh/2009/04/14/django-openid-auth/ and https://launchpad.net/django-openid-auth https://launchpad.net/django-openid-auth ) and Simon Willison is almost ready with his new plugin at http://github.com/simonw/django-openid/tree/master http://github.com/simonw/django-openid/tree/master . These plugins are just drop in and go for the most part. When you have tools like this, seems worthwhile to do so.