[negativeview]

I'll look into Persona. It probably won't be today as I'm trying to be extra attentive to the site while I'm drumming up traffic, but it's on my list now.

In theory you could build it in one sitting then share it. And I suppose there's use there. I don't particularly like the idea of people not being (necessarily) able to edit after the fact. That might not be as big of a downside as I think it is though. I'll mull that over as well. It works for imgur, after all, and even though I have an account I fairly often use it without signing in...

[scrollaway]

I think this is mitigatable by allowing your users to merge their account into a new one. So this is functionality you can implement serverside, persona does not by itself prevent your users from changing their email - it just doesn't provide the possibility (right now?)