For all of you who have requested a map, I finally have one I'm mostly satisfied with. Posting it here with a high enough resolution isn't workable, so I've put it up in an account on Deviant Art. If you search for "Challengeworld" or "Challengemap" it should come up.
If you're still having trouble finding it, let me know and I'll figure out what the problem is.
If there's a location that I've mentioned in the story and it's not on the map, let me know and I'll add it.
Thanks for all the notes from those who enjoy the story.