In less than two years it has created the underlying structure for more than 20,000 social-networking sites--"mini-Facebooks" with an aggregate of 300 million page views per month. You've probably never heard of it.
Crowdstatus is made up of twitter crowds, each crowd contains people and each twitter person in the crowd has a status. This means that you can see what everyones current status is in a crowd.
Zigtag is a revolutionary new semantic, social tagging service that allows you to save your favorite websites, see what your friends are tagging, and find the sites you're really looking for!
Socialthing! is in private beta - see everything that's going on with your friends in all the sites you use, easily figure out where you're missing connections with your friends, interact with multiple sites at once, and more!
Ping.fm is a simple service that cuts out the middle man when it comes to posting to your social services such as Facebook, Twitter, Jaiku, Tumblr and Pownce with more being added soon.
Now, any business can create a Facebook profile, or business page, which any Facebook user can become a "fan" of. You no longer have to be a Fortune 500 company to afford this. It's free.
A home-based millionaire and a redworm farmer Radio Show Home-Based Business StartupNation's Rich Sloan, chief Startupologist, interviews winners from the 2007 StartupNation...
We have taken a sample of nine of these companies - Ning, KickApps, CrowdVine, GoingOn, CollectiveX, Me.com, PeopleAggregator, Haystack, and ONEsite - all of which provide free baseline services, and reviewed them individually below