Among the top 10 social networking websites, Facebook ranked second by the market share of U.S. visits with 16.91%, followed by MyYearbook, which received 1.54%.
MyYearbook experienced the largest gain in market share in June among the top five visited websites, increasing 318% compared to June 2007. Tagged and Facebook followed, increasing 45% and 40%, respectively.--Gavin O'Malley