"Contrary to MG’s point — OpenID has gone mainstream, in a similar way to IMAP or SMTP. That is, it’s powering the identity and single sign-on transactions of millions of people everyday — but, to MG’s point — they just don’t know it yet. The more often you see the “sign in with your X account”, the more OpenID is creeping into the everyday web user’s experience. This is certainly a good thing, considering the fact that OpenID is an open protocol that anyone can implement. The problem is that we’re running up against what we call the “NASCAR problem” — where, because “OpenID” as a concept and brand hasn’t been well socialized — we’re putting companies and corporate brands in place of people’s names and faces. Thus, rather than signing in to leave this comment as “Chris Messina, who hosts his account with Facebook”, I would be clicking the Facebook Connect button — signing in first as a Facebook user, and second as an individual. This duality won’t scale — and requires a word to..." - Chris Messina

I think this will become visible to the users when Action cards start to be more widely available. Also, the <input type="openid"/> tag in HTML 5 will help with that. - Jesse Stay