Some spot on the main menu that show's who's birthday it is so that users can flock the birthday nuffian and congratulate them ! I know that this function is pretty much useless but it's something that could be nice.
If I remember correctly the function was present at the begining of nuf. However as the userbase rapidly grew it was removed. I remember this suggestion being rejected before after a comparison between scribblehub which has the function was brought up.