More people are embracing social networks like MySpace and Facebook, but use of these friend-gathering sites remains a much bigger phenomenon among the young, according to a report released Wednesday by the Pew Internet & American Life Project. Of the roughly three-quarters of U.S. adults who go online, 35 percent use social networking sites such as MySpace, Facebook or LinkedIn, Pew found in a survey of 2,250 people late last year. Just 8 percent of adult Web users were on social networking sites four years ago.
