We had a problem where someone installed a plugin that requires people to request an account, and then a wiki admin has to confirm the account. Unfortunately whoever set it up did not configure the plugin to send emails to notify anyone of pending accounts. This has caused two accounts to be pending, one since the 28th of May. I have confirmed these accounts and set up the plugin to send emails to the sudo-sys list every time someone requests an account and confirms their email address. I also patched the ConfirmAccount plugin to allow multiple destination emails. To add email addresses to receive these emails, change the $wgConfirmAccountContact in LocalSettings.php. To view the patched code, simple grep for Juul in the extensions/ConfirmAccount directory.
We also had a problem where no-one was being emailed about pending messages for the sudo-sys list. I added myself and Jordan (hope that's ok, but otherwise you know how to remove yourself). Other people can add themselves via the mailman admin interface:
http://lists.sudoroom.org/mailman/admin