It'd be nice if WP could authenticate commenters/people using OpenID as their authentication source. We already have the URL field, we could just auto-create the account for the user, or perhaps just use the information and remember to say that the user was authenticated.
But what would really be killer is if WP could itself serve as an OpenID authentication service, so blog admins could type its blog URL and have WP negotiate the auth details with client services. Naturally this would require that the admin interface let the admin select which user would be authenticated (cos not all of us use the Admin account for posting, ya know) -- perhaps via a dropdown?
