Now adding a “social component” to your site is as easy as putting a YouTube video or a spin button on it. After the May announcements, Google finally launched Friend
Let me remind you that Friend Connect is a service that allows webmasters to add user authentication modules to the site (now, in addition to Google accounts, Yahoo !, AOL and of course OpenID are supported), discussions, invitations to friends, etc.
“We know that people on the web like to build social connections.Friend Connect makes it easy to authenticate on the site, gives you the opportunity to tell about yourself using a personal profile, find new friends with similar interests, or invite old ones to the site. ”