WordPress.org

Authors: wnorris, factoryjoe

Upgrade Notes: If you are upgrading to version 3.0 from a previous version, it is extremely important that you backup your blog before doing so. This release includes database changes that, though they have been thoroughly tested, may cause problems. You will also need to deactivate and reactivate the plugin after upgrading.

OpenID is an open standard that allows users to authenticate to websites without having to create a new password. This plugin allows users to login to their local WordPress account using an OpenID, as well as enabling commenters to leave authenticated comments with OpenID. Version 3.0 includes an OpenID provider as well, enabling users to login to OpenID-enabled sites using their own personal WordPress account. XRDS-Simple is required for the OpenID Provider and some features of the OpenID Consumer.

Developer documention, which includes all of the public methods and hooks for integrating with and extending the plugin, can be found here.