admin approval required for new users?

Does such a plugin exist? Or are there settings in wordpress for such a thing? (I have searched and only found registered users are required to comment checkboxes... but now "admin approval before you can be a registered user.)

BTW, I found this: New User Approve 1.2.6 (but it doesn't actually do as advertised.... never emails the admin when a new user is registering asking me for approval, never puts the new user in the "needs approval" column.)