1. The document discusses social networking sites like MySpace and Facebook and provides statistics on their popularity and usage, especially among teens and college students. 2. It then discusses privacy and security concerns when using social networking sites and provides tips for safe blogging and social networking. 3. Finally, it discusses why libraries should consider establishing a presence on social networking sites, such as to educate patrons and stay relevant, and provides some tips for libraries regarding rules and maintenance of social media accounts.