WordPress MU

When I first install WPMU, I will be Site Admin for the whole WPMU, correct?

Then I create a few blogs, and add some users with Administrator role. Can they remove me as admin for their blog, which means I have no control over their blog anymore?

Is there any documentation the different features/functions for different roles? Am a little confused over admin and site admin. Tq.

SiteAdmin rules them all. You can't be locked out of anything.

The only thing that isn't really documented is the Site Admin, and like dsader said: you rule all. :)

http://codex.wordpress.org/Roles_and_Capabilities