Ning.com is a place for people to create their own social network.  It’s also a place to go and visit niche social networks.  Ning.com makes it very easy to create a social network, and allows members to customize it however they want.

For a small fee, members can get their own custom URL and have advertising removed.  Members may also pay a fee to have more bandwidth and online storage.

There are over 185,000 hosted networks, and this has been a place for alumni groups and hobby enthusiast to find unique networks to join.

Demographics
Ning.com has roughly 1.5 million unique visitors per month, and most visitors are from the United States (30.6%).