However, as we all know, the demand for trade is fairly low really. Unless you enforce specialisation on yourself, you can make pretty much everything... Then again, specialisation to some extent is probably a more efficient way of running things once you get a large enough scale or production going...
To cut to the chase, I have an idea for a new settlement, although I am already comfortable in ShadyAcre myself...
Basically, how about somebody sets up a base here....

Name: SwampTown

Main Export: Leeches!
Basically, somebody who has a bit of time on their hands, likes playing while watching TV, doing other stuff, could become a 'wader' in SwampTown. Waders just stand around in the swamp, collecting leeches, and storing them up. Then you can trade them with people for all the various goodies you could want. Voila!