Sergey Brin, co-founder and president of Google, smiles at the annual Allen and Co.'s media conference in this July 12, 2007 file photo, in Sun Valley, Idaho. Google Inc.'s stock price sailed past $600 for the first time Monday, Oct. 8, 2007, extending a rally that has elevated the Internet search leader's market value by about $25 billion in the past month. Credit: AP Photo/Douglas C. Pizac file
