If you want to consume these claims you will need to ask for:
http://schemas.xmlsoap.org/ws/2005/05/identity/claims/verified/emailaddressI have blogged previously about how you might validate an iname claim
We are publishing our own 'white list' of claims providers that we consider 'trustworthy' in order to 'trust' the verified email claim. More on that soon.
If you want to start consuming our verified claims at your RP just let us know and we can do some testing together.