Well we do have some groups, we call them Hash groups, as all groups are prefixed with a # and thse contain the users
These are purely Email distrobution groups and have been superceeded by the security groups and will be removed in the next month or so as the # groups where an old solution when we were on an old NT domain.
I can put the idea forward to our network administrator, but I don't think he'll like the idea of having old hat on a new head... so to speak.