Blogger Guide, Comment with OpenID

OpenID is an open standard that allows users of OpenID-enabled services to log in to any OpenID-supported site with one set of login credentials. What does that mean for your blog? It's a way to authenticate user comments on your blog, without requiring your readers to have a Google Account. For example, let's say you have a friend, Brady from LiveJournal, who doesn't have a Google Account. With OpenID, he can now comment on your blog using his OpenID credentials and identify himself as the owner of http://brady.livejournal.com, instead of commenting anonymously. Please see the OpenID site for more information about OpenID.

How do I Enable OpenID Commenting on my Blog?

Simply go to your Settings | Posts and comments tab and select "Registered Users" or "Anyone" for the "Who Can Comment" option. Don't forget to click "Save Settings" at the top of the page.
Note that allowing "Anyone" to comment on your blog will allow more than just OpenID users to comment.

How do I comment Using my OpenID identity?

Start off by going to the comment page of the post where you'd like to comment. Then, select your OpenID provider from the drop down menu next to the "Sign-in using" option. If your OpenID provider is not on the list, please choose the "Any ID" option.
Next, provide your OpenID login information. After you click "Publish Your Comment," you will be redirected to your OpenID provider to authenticate your ID. After authenticating with the provider, you will return to the comments page and your comment will automatically be posted. Your comment will appear appear with a OpenID icon to the left of the comment.
Note that your display name is the name sent to us by the OpenID provider. If no display name is given, we will try to derive it from your OpenID URL. This is the name that will be displayed as the author of the comment and will be linked to your OpenID URL.