Those of us that use LastPass / 1Password are better off creating independent accounts with separate passwords rather than centralizing auth to a service that still basically relies on a single username / password combo.
Because it never gained traction and Facebook Connect pretty much killed it because it doesn't require setup of an additional service. Mind you, Facebook Connect is a big privacy and security risk, but it's much 'easier' to a user than setting up OpenID, which is why it won.
I only hope Persona takes off, as it's a much better solution.
I think, there're way more disposable email services than non-authenticating OpenID servers.
Knowledgeable users should not be punished because of dumb users.
If your system sucks, make it suck less. Don't remove options. Add friking paragraphs of well written short copy explaining the issue and create a better world. with less dumb.
I'm afraid people like this is working for Mozilla... Afraid Mozilla 30 will be gnome 3.
The weakest link of security is always the human factor.