WP Symposium is a new suite of social networking plugins for WordPress by Simon Goodchild. – forum, wall, member directory, private mail, notification bar, chat windows, profile page, widgets, and more! Webmasters can choose which you want to activate!
There is a huge number of features listed.
Latest New Members
Latest Forum Posts
Full info and download at: http://wordpress.org/extend/plugins/wp-symposium/