Arjun,
What if you were to bring back the idea of "new stuff"?
When someone asks for "new stuff", gets a page with links to everything new out of the things he subscribed to.
For the admin of some particular service, this would mean showing him/her everything relevent to that service (s)he hasn't seen before.
If the admin deals with more than one service, new stuff shows a single page that combines (catenates, not links to) all the things they're responsible for.
For pending users in particular, howbout a list view of all the pending users with a checkbox by their name, checking all you'd want to add then hit the button, all selected get added.
