A nice little feature would be the ability to request a "mini-league" view for the reputation leagues.
The view would have the same display as the normal reputation leagues, but would only consider the selected users for the data.
Since this would a power-user feature anyway, it could be implemented as an ability to supply e.g. a specially crafted URL containing the specified user IDs.
The rationale for such a feature would be to further foster friendly rivalry within an organization or a group, therefore increasing their collective contribution to relevant SE sites.
Of course in some group dynamics this might devolve into a pathological situation like rat races for the highest rep, but due to mechanisms present on SE those groups would either become quickly discouraged, or (also quickly) learn the proper participation approaches.
To further clarify, the intended effects I hope for:
- to promote positive, active participation on SE. If people see that their colleagues regularly participate in SE and do fine, they'll be better motivated to move beyond reading and posting ad-hoc questions.
- to provide local sources of mentoring on proper SE behavior/etiquette: having a more experienced colleague (who you know is experienced from your group's league) explaining why your post got downvoted etc. is probably less painful and would lead to a better, quicker reinforcement of preferred behavior. This would hopefully work the other way around as well, i.e. a high-rep user would feel responsible for mentoring people their colleagues who aren't doing so well.