alright, dude, you got the job.
Actually your mapping is quite impressive.
So here's what I need
One large city, and by large I mean huge, and by huge I mean if you contain it in one map you're gonna need 200x200 or somthing like that so I would advise you seperate it into mulitple sections.
A large amount of small scale detail is not nessecary, but simply the city must be well arranged on a large scale, with the spaces between buildings forming labryniths of roads that it should be possible for a player to honestly get lost in. This should be a dark and dismal london style city full of alleyways, big towers, churches, etc. as well as plenty of annoymous houses. This is an exterior job only, so the buildings should just have doors that don't do anything when you touch them. One side of the city should connect to a dock-type area that leads out to a large body of water that can't be crossed. The other sides can just end in solid walls. Basically what you're aiming for is to go as big, dark and intimidating as possible. Cobblestone streets, probbably, and possibly a 'slum' section of town with crumbling buildings, and well, whatever else you might want to throw in. You have at least two months so there's no rush whatsoever, but I would appreciate if at least every other week you updated me on your progress.
In return for this job you will be the only person outside of myself who gets credit in what I hope to be a succesful game, and also a promotional bump for any website you might want to draw attention to.
Alright, good luck, and I'll look forward to seeing this city take shape.