Right now you get "ancient member" status with just over 300 posts. There really should be higher rankings considering that some users have thousands of posts. Having them in ADOM monster style (greater mimic, master mimic etc.) would be extra fun:
0 posts= invisible stalker
1+ least member
10+ lesser member
50+ greater member
100+ member chieftain
250+ master member
500+ member lord
1000+ member king
2500+ member emperor
5000+ ancient member
Whatever you do, please do not encourage mindless posting.
I like how (most) of the posts around here do contain... bits of thinking, and actual work to be readable, understandable and valuable. .
The interesting posts ratio is excellent so far, especially since we do not sell cheap vuiton handbags nor funny lue pills any more.
Nice suggestion--though I feel 'greater member' should be among the higher postcounts. The 'greater' monsters from ADoM ('greater daemon,' 'greater claw bug,' ect.) were definitely more dangerous than the 'chieftain' monsters (of which I can only remember the 'hobgoblin chieftain').