Friend Connect

Google is planning to launch Friend Connect-- a tool that website owners can use to give their site a more social feel.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. there is only limited preview if we sign up. Once it is launched, website owners simply have to answer a couple questions that Google uses to generate some HTML -- paste
it into our website and we're done. This is an extremely easy way to add social features to our website without knowing anything about coding. To see how to do it watch this video