Pretty self explanatory. A module which allows you to create smaller individual post-like pages. Page edits can be requested. Pages can't be publicly commented on. There are page sections. All of the pages are like the current page system, but all accessible within one sidebar. The main page of the Wiki could have an index page.
This isn't the answer you are looking for; if you want basic integration, you can create a custom page and Iframe your CraftingStore shop.
This is unrelated (but doesn't feel worthy of a new thread) and should be addressed, maybe fix this?
(It should say Monology everywhere I believe)
Sidenote: Site Suggestion: Please add a Module label to Web Feature Requests.
Not expecting anyone to do this, but if you were up to the task, could you create a Blog module for Nameless? Most of the code could derive from the Forums module.
This could be integrated into the NamelessMC plugin. Your suggestion is structured really well in the way that it would be on the play page and it wouldn't be too hard (I assume) for the developers to integrate this considering they have all the variables necessary. Though this would mean site could only use MC names, no custom names.