perhaps newest photos posted (i think you put a photo search feature on, but a front page alert when new pics go up would be cool)? users with the most friends? maybe a running total of how many spammers have been blasted off the site.
maybe a more intricate version of "top thanked" by making it only thanks received within the last month or 90 days, to see who the current "heroes" of the forum are. cuz the top five overall thanked is probably not going to change unless they all go away for a long time, hence i think why you replaced it with "top posters".
that's all i can think of right now.
