Social Networking Services (SNS)

Social Networking Services provide the platform for users to: interact, share themselves, create content, email, video, voice chat, file sharing, blogging and discussions. This is accomplished through identity, presence, relationships, conversations, groups, reputation and sharing. Many people use these SNS sites to socialize with others online and extension of their physical life. In a comparison of MySpace and Facebook, the author liked the look and applications of Facebook. Facebook was said to be 'cleaner and more user-friendly space." I am under the impression that MySpace is open source, is it? It was stated that if you know HTML you can do whatever you want, but this was also the main reason they didn't like it, lack of consistent look.
I agree that we need to engage users (or student's) where they are, we can no longer expect them to come to us. This is a hard sell for a private residential campus!
I had never heard of Ning before, has anyone participated, posted or joined a Ning network? Last.fm is something I would like to investigate more, I attended a presentation on it at the last Music Library National conference. Maybe a good idea for a music library??
Finally, does anyone know of a library blog for parent's on manga and anime? (This was a MySpace suggestion for public libraries). My youngest daughter loves this stuff and I haven't taken the time to learn more about it.