...be nice if you could divide that into top posters (a) all time; (b) this month; (c) this week.... or ...whatever arbitrary time slice you wish to make (like top poster in the last 13.6 days).
And as long as we're collecting post stats, how about (a) total stats on number of url's posted; (b) average of most/least words per post; (c) most 'responded to' poster; (d) poster with the most spelling errors. :-)