One theme I have harped over the last year of so is that it means little for the big content providers to become OpenID providers if they don’t also become relying parties. You can’t build a highway with nothing but on ramps.
So far the vast majority of OpenID announcements by the big players have been to be yet another OP, or just signing up for the OpenID Foundation. It looks like the game is finally changing. Apparently Facebook is getting ready to become an OpenID Relying Party. From Inside Facebook:
Less than three months after joining the OpenID Foundation’s board as a sustaining corporate member (i.e. putting its weight and financial support behind OpenID), Facebook has just announced at the “technology tasting” event this afternoon at its Palo Alto headquarters that users will soon be able to log in to Facebook with their OpenID.
This could be huge for OpenID adoption, if it really happens.