Best Friend-Networking Websites 
There are sites all over the Internet that allow you to sign up and "connect" with your friends. This lists the best, or at least the most popular, on the web.
Resources
This was the first, but is no longer leading the pack.
Google's Orkut.com, an under-developed site that is along the same lines as MySpace, tribe, etc.
Americansingles.com is one of the most popular sites for online daters to meet.
Defining relationships -onlinedating and friendship to the world
Provide a high-quality resource for like-minded people seeking friendship, dating and fun.
Sconex is an online directory and social networking service for high school students which was started in late 2004.
Tribe.net: An up-and-coming networking site originating in the SF Bay area.
The industry standard of social interaction websites.
The community for people with Powerful Intentions.
I like PowerfulIntentions because the people are focused on the same thing. Improving their lives and assisting others that are wanting that, in doing the same!