Read this article from Socially Cubed.

“Repeat after me: It’s the SOCIAL that matters in social networks, not the network. On or offline, it’s the community that matters, not the structure. Even where there is no structure, community will emerge. Look at Twitter.

The engagement is what matters. Not the form of the network. Tweeter, Blogs, Facebook, communities like Cafe Mom and BlogHer, Twitter, LinkedIn, “Old fashioned” forums and bulletin boards. These are all forms of social media engagement. The trick is to find the ones that matter. To you. To your business.”