Several weeks ago, I attempted to enable OpenID logins on this blog. It didn’t work well. It didn’t work at all. Bad Behavior, which I consider absolutely critical in cutting down the impact of spambots, also broke the chain of redirects/reposts that enable OpenID logins. Now, however, with Bad Behavior 2.0.30 (and 2.0.31), the RPX plugin from JanRain works!
It is now possible to log in with OpenID, automatically creating an account, and to associate an existing account with an OpenID for future logins.
Personally, I suggest MyOpenID (from JanRain) because it gives the option of using PhoneFactor’s phone-call-based 2-factor authentication.