I find that the current Admin groups don't suit our purposes and so thought I would suggest what I would like to see. Basically it would be great to be able to assign UserAdmin or UserAttributes rights to a user, but only for a defined set of users (most likely a group). To give a concrete example, we have one central Scalix server that we use for many offices around the world. It would be great to give say our SysAdmin in France UserAdmin rights, but only to users in the French office. This way he could take care of password resets and email alias requests, but we can be confident that he can't go messing with other user's accounts.
I would think this would be something that a lot of people might use.