I’ve added OpenID authentication here, thanks to the excellent WordPress OpenID Plugin from VerseLogic. If you already have an OpenID identity, you can now use it when commenting here, and your name will be flagged with an icon to signify that your identity was confirmed. If you don’t already have one, you can sign up with any of several OpenID providers. I use MyOpenId.com for mine.
If you want to read more about what OpenID is about, try starting with Simon Willison’s excellent post, How to turn your blog into an OpenID. For the flip side, learn what OpenID is not: An OpenID is not an account!
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