Monsters By Email website / soon to be subscription service. He was kind enough to allow me to peek at some additional pieces of his work. The stuff is amazing.
Anyhow, my party will be entering "The Gut" in our next session of the Rappan Athuk campaign I'm running, which is kind of like a huge underground "highway" between sections of the megadungeon.
I don't know what this guy will be doing there just yet, but he looks intelligent enough to have a purpose.
I guess I have a week and a half to figure out what that purpose is although I am open to suggestions ;)