Currently, 16.5 million adults ages 55 and older engage in social networking, according to Internet monitoring site comScore. Facebook is seeing the most growth among users age 30 and older. MySpace, with 130 million users, is enjoying a surge among the 55-plus set, who total 6.9 million users and spend an average 204 minutes a month on the site. And in just one year since AARP.org unveiled its social networking platform, about 350,000 users have created 1,700 groups celebrating everything from gardening to social activism.
