Resources:

http://www.topsite.com/best/social%20networking?ref=0800
http://www.surfnetkids.com/go/safety/173/youtube-what-is-it-and-why-use-it/
http://gizmodo.com/5751862/a-perfect-definition-of-facebook
http://webtrends.about.com/od/socialnetworking/a/what-is-twitter.htm
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