Last modified: 2007-11-27 16:50:35 UTC
a) ability to delete a user b) admin ability to retrieve and reset a user's password
a) This is bug 6397. Please vote for that if you support it. b) Passwords are hashed and it is physically impossible for anyone to retrieve them (without guess-and-check). Developers can currently reset passwords; allowing it as a permission might not be something the devs are interested in implementing, but I'll leave that to them. In the future, please file separate requests separately so they can be dealt with separately. Since half of this was a duplicate, I'll just edit it so that it's only the second half of your request.
b) User passwords can be changed by shell ("php maintenance/changePassword.php").
Moving to an extension, since I'm not sure this is something we'd want in the core code. Permissions also aren't enough, we'd need the interface itself created, and of course, with that would *come* a permission setting.
The new extension http://www.mediawiki.org/wiki/Extension:Password_Reset should solve your issue b). -> Bug FIXED.