You can change user state in the individual user admin pages
(
http://somesite.com/acs-admin/users/one?user_id=2477)
I haven't seen a "show me the users pending approval" page,
but you can easily do a search in the user admin section for
people who registered within the last couple of days, or who
have never logged in... but yes, a "who needs to be approved"
page would be usefull...