What we would like to be able to do is to have hierarchical Labels. This feature is currently present in Mediawiki where you can create a Category and sub-categories. An example of this may be that we would like to label pages with CRM that have to do with CRM and when clicking this label see Microsoft Dynamics, Salesforce.com etc as sub-labels to this label. Vice Versa if you click on a MS Dynamics label you would want to see that it is a sub-label of CRM (and maybe also of Microsoft)
The user benefit lies in the fact that it allows to group labels into subsections.
It would also be nice if the output could be such that like in the Wikipedia it gets ordered alphabetically and shows all the subpages etc http://en.wikipedia.org/wiki/Category:Cartilaginous_fishes