BuddyPress will extend WordPress MU and bring social networking features to a new or existing installation, which SimpleScripts installs as a combination package.
BuddyPress is a suite of WordPress plugins and themes, each adding a distinct new feature. BuddyPress contains all the features you would expect from WordPress but aims to let members socially interact.
All BuddyPress plugins can be themed to match your own style, in just the same way as a WordPress blog. The BuddyPress plugins are bundled with a default theme to get you going out of the box.
As all BuddyPress plugins are independent, they can be used in two different ways. All of the plugins could be used to create a complete social network from scratch, or you could use specific plugins to add desirable features to your existing blog network.