Good News For Open Source and End-Users: Drupal 6 gets OpenID support!
Good news for Open Source users!
"After much hard work led by James Walker, OpenID 2.0 support is now in Drupal 6 core! OpenID is a decentralized, secure single sign-on system. It allows you to create a login at a site you frequent, and use that same login on any other site that supports OpenID. Drupal 5.x and below have supported this with the built-in Drupal module, but OpenID is an open standard, better supported, and more secure. "Let this be the day where we help…" -Source
See also: Current Fix For Wordpress OpenID Modification (re: Login & Logout Format)