Social networking sites grab big slice of Web ads

About one of every five Internet display ads in the United States is viewed on a social networking Web site like MySpace and Facebook, according to a new report.

The report by analytics firm comScore underscores the increasing prominence of social media sites in the Internet landscape and broadening acceptance of the sites by brand advertisers.

http://www.reuters.com/article/newsOne/idUSTRE5805QX20090901