[jnorthrop]

Its a clever idea but I would think it would be frustratingly slow to login via email. I wouldn't be surprised if it took 20 seconds or more to complete the entire transaction -- that is a long time for a relatively simple operation.

[jasonkester]

As opposed to OpenID, which takes that much time by design. Or more, since chances are you don't know your OpenID and therefore have to look it up in your email.