In the Member's section, add a statistic indicating the average word count (not including quoted material) of each member's posts. This would tend to discourage certain members from making many brief, chatty and unnecessary posts in order to run up their post count.

EDIT: (If that's a non-problem, then the statistic is still arguably worthwhile, for curiosity's sake.)

Would make a great mod. :thumbsup:

It could work as a "shame on you" to all those people who don't add content to their posts.