Ah, discussies, discussie.

Basically, Google has rewritten OpenID. Not only is it not exactly the same as the current OpenID protocol, it’s so different that existing OpenID relying parties won’t be able to use it. Only a handful of “partner sites” have been updated to understand Google’s perverted version of the OpenID standard, and anyone else hoping to authenticate via “OpenID” to Google’s servers will need to do the same.