Something that lets me use my email address as my ID.

I can remember my email address. I can't even remember which openID provider I used to sign up for StackOverflow, let alone how they expect me to form the URL that I use for my login.

So once a month, when my cookie expires, I get to perform a forgot-password-like action, where I dig through my email to find my username, then try several combinations of it and claimid.net (or was it .org) until it lets me in. But I'm not in. I still have to type in my username and password and, click OK, then click OK on a second screen.

That's on the order of 10 more steps than it takes me to type in my email address and password. I remember my email. And I can type it in 400 milliseconds.

The thing that replaces OpenID needs to understand that.