I have my open id with verisign. https://pip.verisignlabs.com/

Verisign doesn't give me an email address but stores info about me including what my email address is, nickname, dob, time zone etc. In this case I have my verisign pip store my gmail address among other things and when I signed up for stackoverflow among a few other sites I had a page showing what my verisign pip stores and which of those infos I would like copied to my newly created stackoverflow account.