BuddyPress.org

@nahummadrid, I really like that idea. So,

If an exsisting user goes to example.com, they see a simple login prompt: Username/Password.
They enter their user/pass and they are automatically redirected to the ‘section’ (or installation subdomain) of the BP website. Each ‘section’ is independent, and no information is transfered between any ‘sections.’

That’s what I want.

…. This all sounds very exciting!