The setting in MW is almost purely an example. Ben has indicated that there might be some expansion of it, but it's really like the material presented in RQ6, an example world used to present the rules material and a start to designing your own campaign.
He's currently gathering errata from those who have purchased the PDF, some of the errors he's managed to get into the manuscript before submission to the printer, other issues are going into an errata document that will be available via download. Updated PDF's should be available via download. As Chaosium doesn't do like OBS and show you if any of your downloads have been updated by the publisher you'll need to keep an eye on Ben's postings. I'd suggest at BasicRolePlaying.com or rpg.net forums.