Like any sensible person, all my security question answers are of the "Correct Horse Battery Staple" type.
I don't see how introducing a single untrusted third party, many accounts or otherwise, is better than using a couple of trusted third parties such as gmail and hotmail.
The goal of Persona is that you should be able to use Hotmail and Gmail as your trusted identity provider; the current system is just a stopgap until there's more support from providers.
I don't see how introducing a single untrusted third party, many accounts or otherwise, is better than using a couple of trusted third parties such as gmail and hotmail.