This is still a work in progress. I've tweaked the numbers a little added local guides and now that I have my campaign's first rogue, figured I'd give him a bonus too.
I'm still thinking about making regions-- The Grand Bazaar, The Docks-- or landmarks-- The Bronze Statue of the Laughing God, The Plaza of Forgotten Gods-- that might affect the likelihood of finding certain things. But I'm hesitant to pin Nidus down too much. I want it to be bigger than life, and mapping seems to work against that.