Google co-founder Sergey Brin looks at a computer on the company's campus in Mountain View, California February 9, 2010. Googe Inc unveiled Google "Buzz", injecting its social networking features into its popular Web email product as the world's No. 1 search engine seeks to fend off competition from Facebook and Twitter. REUTERS/Robert Galbraith (UNITED STATES - Tags: SCI TECH BUSINESS)