It’s official: Google has just announced Google Buzz, its newest push into the social media foray. This confirms earlier reports of Gmail integrating a social status feature. Google Buzz is a new way to start conversations about the things you find interesting. It’s built right into Gmail, so you don’t have to peck out an entirely new set of friends from scratch.
http://googleblog.blogspot.com/2010/02/introducing-google-buzz.html