I am considering applying OpenID, however i drawing an empty regarding the way the database would look with new / existing customers. So how exactly does stackoverflow get it done? I realize the notion that an exterior site does the authentication for me personally, but so far as storing user info on my finish I want assist with.

Best recipe of enabling OpenID online anybody could ever think about: http://www.plaxo.com/api/openid_recipe. Beginning to end from designers of Plaxo.