Hitwise: Facebook Makes Gains In U.S.

Facebook users just don't seem to be as young as they used to be. And they're going to the social-networking site a lot more often. A new report from traffic tracker Hitwise shows that U.S. visits to Facebook grew 149 percent in February compared with the same month a year earlier. That pushed Facebook's market share among folks in the United States visiting social-networking Web sites to 36 percent last month, versus 14 percent in February 2008...