WordPress MU

Hi: I decided to use Mu so that I could create 4 separate blogs for my churches website. I noticed that when I try to view it on a different computers, it will ask if they want to create a blog. I don't really want that option available. Is there an option someplace I missed to disable allowing others from automatically creating a blog? Thanks, Matt

You can modify wp-signup.php file:

Find string 14:
get_header();
and add after it this code:

if ( is_user_logged_in() ) {
$user = $current_user->user_login;
if ($user != 'admin') {
print "You can't create blogs.";
get_footer();
die();
}
} else {
print "You can't create blogs.";
get_footer();
die();
}