Why not?
I've increased the post count rqeuirements for all the ranks - SuperLemming is now so high that
no one has it yet. Even Mayhem, there's only two users who meet it (myself and ccexplore xD). However, once more of the LemmingsWelt / IsaMedia posts get linked to users, this might change...
So what are the new values?
Fun: 0
Tricky: 150
Taxing: 750
Mayhem: 2000
SuperLemming: 5000