The Thursday (2nd day) keynote for PubCon South 2009 was given by Matt Cutts, head of the quality assurance team at Google. He was introduced by Brett Tabke.
Before launching into his usual Q&A, he introduced us all to Google Friend Connect API
This morning at PubCon here in Austin, Google's Matt Cutts announced
the Google Friend Connect API
Google Friend Connect
is a single login system for interactive websites such as blogs, forums or social networks. It can use your existing Google, Yahoo, AIM or OpenID account.