I've seen more than a few "fill the world" campaigns in my time, but trust me, they are nothing like what is going on in Wilk.
I started by reading the Wilk forum about a year ago, because it seemed to be filled with user content. I stumbled upon CJs radio show, and i knew then that I had to get a team in this world.. If you haven't listened, check out 1 or 2 of the podcasts, and you'll get an idea of why awags and many others are so excited about this world. Wilk Central and Twitter are nicely done as well.
As for the competition, this is the closest thing to the filled worlds from yesteryear. If you want human competition, you won't find a more difficult world to test yourself.
Give it a try, and come join us!