Google has made Friend Connect available to all webmasters in a beta form. Friend Connect lets sites add social networking to their site. But users can sign in with an established account from Google, Yahoo, AOL, or OpenID, instead of creating yet another account.
Here's a vid with more details
The Original Search Marketing Event is Back!
SES Denver (Oct 16) offers an intense day of learning all the critical aspects of search engine optimization (SEO) and paid search advertising (PPC). The mission of SES remains the same as it did from the start - to help you master being found on search engines. Early Bird rates extended through Sept 19. Register today!