It's mainly a challenge I gave myself and TwilightBlade. We go to boards we don't really contribute much towards, and at least make 5 quality (somewhat quality, anyway :x) posts. You should try it!
What makes it challenging, is that you have to beat your friend to those 5 posts. :> At the same time, if you guys both post in the same thread, whoever is listed as the latest poster out of the two, you'd have to post again to make five.