Just recently with the use of data portability, google lunching Friend Connect and press release of Google
“Websites that are not social networks may still want to be social — and now they can be, easily. With Google Friend Connect (see http://www.google.com/friendconnect following this evening’s Campfire One), any website owner can add a snippet of code to his or her site and get social features up and running immediately without programming — picking and choosing from built-in functionality like user registration, invitations, members gallery, message posting, and reviews, as well as third-party applications built by the OpenSocial developer community.
Visitors to any site using Google Friend Connect will be able to see, invite, and interact with new friends, or, using secure authorization APIs, with existing friends from social sites on the web, including Facebook, Google Talk, hi5, orkut, Plaxo, and more.”
Erick Schonfeld who talked with Google engineering director David Glazer and you will get more information from techcrunch