revolution in the authentication

A little revolution in the users authentication is going on. The rapid spread of a tecnology like OpenID could infect a weighty part of the web. Probably it has already infected a big part of it. Company and communities like: google, facebook, yahoo, sourceforge and others have already added OpenID authentication. Some of them serve also the provider side of authentication for OpenID.
Some resources:
http://openid.net/specs/openid-authentication-2_0.html
So lets try it!