Setting up your own social network

Here are some links to modules to set Drupal up as a social network –
http://drupal.org/node/206724
http://www.228webstudio.com/content/top-7-drupal-modules-building-social-networking-site

And here are some other open source software to create a social network:

Dolphin by Boonex
http://www.boonex.com/dolphin

ellg
http://elgg.org/