Or is it spreading yourself too thin. How many social networking sites do you belong to, and how many are trying to get you to aggregate your contacts there? Most evident in my case is Plaxo and Spock. The invites have been coming in from folks I know on other networks, because those people have just joined up. But is it worth doing, or will some of those networks go by the way side?

More: http://tinyurl.com/2ud6ua