BuddyPress.org

Blogs can have their own users in MU; they always can. The line gets blurry when you start talking about “sites” though, because a “site” is just another blog where users have roles and caps… The WordPress dashboard doesn’t really make this a clear thing visually, but at the end of the day you still only have 1 users table, regardless of how many sites or blogs you setup and how many users have what roles/caps on which blogs/sites.

Dizzy yet?