Social Networking with BuddyPress - Nettuts+
John Tropea - Delicious Social Network
APRIL 20, 2009
BuddyPress is a social networking application built on top of WordPress Multi-User (MU) as a plugin. Unzip the combo file and upload all the contents of the extracted zip to the root mu-plugins folder located in wp-content. Move the mu-plugins/bp-themes folder you just uploaded to wp-content. However, there are a few cool plugins available for BuddyPress right now: bpGroups which includes improvements to the group system.