BP Social Network plugin for Buddypress features Friend requests, Private Messaging, Global Notifications, Google Search Integration and Social Virality.
BP Social Network is a fully functional but limited version of a premium Social Network plugin.
Full version includes many more features:
Allow Moderator Drop down to see pending posts for select usergroups
Allow all users to use private message Drop Down
Allow all users to use Friend Request Drop Down
Allow @user tagging like Facebook
Increased customizability
More info: http://vbsocial.com/buddypress-social-network
Download: http://wordpress.org/plugins/bp-social-network/
