I saw it on other sites and I think it is a good idea to have things like
This weeks top contributors
This weeks most voted
This weeks most visited
and so on.
On some sites a new user wont search the competition with other users as they have to many points. But if there is a weekly ranking as well, any user has the opportunity to be the best.
Excellent would be if he could earn some medals or something which could be shown next to his name or on his about site.
May be there could be tabs on the USERS site as well like: all time, this year, this month, this week
I hope it is no problem if I throw in from time to time some feature suggestions.