Use a scope for the user (persona) directive instead of having it barf its data into the rootScope.  ;)

What that says.  It's untested, so you should probably give it a try before you merge.
In Foxograph's index.html, I've got the attribute `ng-init="loggedInUser = {email:<%= email %>}"` on my `<body>` element to make sure the `loggedInUser` object exists in the root scope, and that it has the email address that the server thinks we've logged in as when it first loads the page…