If you need to contact a friend or colleague, how do you do it? Do you go see them, call them, email them, or use some form of the social Internet? Although answers may vary, using the social Web as a primary form of communication is becoming a growing trend. A study conducted by Pew Internet and American Life Project found that 7 percent of Americans rely solely on the Internet for the majority of their social communication.
http://videos.webpronews.com/2009/07/17/is-social-media-making-us-less-social-offline/