Google co-founder Sergey Brin (R) participates in a panel discussion 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. Also appearing on the panel are Google’s Vic Gundrota (L), vice president of engineering, Todd Jackson (2nd L), project manager for Gmail and “Buzz,” and Bradley Horowitz (2nd R), vice president of product management. REUTERS/Robert Galbraith (UNITED STATES – Tags: SCI TECH BUSINESS)