ning.com - the easy way to create your own social networking site

http://www.ning.com/

This site lets users create their own free social networking site with just a few clicks.

You can choose from pre-built templates and sites are 100% customisable and programmable via an api. Mashups with other web apps like amazon and google maps are possible.

Photo and video sharing features are built-in along with powerful forums and events calendars.