I have done a bit of work in the past two years on social networking. The first program I did was the dangers of social networking in regards to the law and getting a job. Two weeks ago I did a program on using social networking technologies in a positive way to help you get a job (though only one person showed up voluntarily, but that's another issue). Today in the ALA Direct weekly newsletter, there was a link to this YouTube video for a song about MySpace that is really great... reminding people of the dangers of leaving it up for your children to find! Expand the "About this video" part to read the lyrics.