There’s a new entry on the WordPress.com FAQ today: What is OpenID? The answer is that it’s “an open standard that lets you sign in to other sites on the Web using your WordPress.com account.”
In other words, WordPress.com is an OpenID producer. As the Jyte user who claimed that WordPress should support OpenID, I have to hail this as a step in an excellent direction.
I hope that it won’t be the only step. A second and even more welcome step would be WordPress.com becoming an OpenID consumer. That would mean that WordPress.com would accept (with the appropriate caution) OpenIDs at login.
Some specific examples might help. http://changingway.org/ is now an OpenID. This illustrates that: an OpenID is a URI; and that WordPress.com domain mapping applies (that URI maps to changinway.wordpress.com). http://claimid.com/andwat is also an OpenID. claimID is an example of a service that is both a producer and a consumer of OpenIDs.