most posts per day
fewest posts per day
most readable (ie bets grammer, spelling, presentation of thoughts)
worst readable (ie opposite of most readable)
most helpful posts
most useless posts
most opinionated
least opinionated/yes-man poster (poster who agrees with everything anyone says)
most confused poster (poster that constantly contridicts himself)
longest post
shortest post that actually gets a point across (gotta have the caviet for that one)
and maybe also do longest and shortest as an award for person that most often posts the longest/shortest posts
just a few ideas off the top of my head
-Darth Simon