Consider the implications of federation where the organizational strategy is to create a new fedwiki for each project.
By which I mean it's like a codex, a book, perhaps even less porous than a blog. It can be added to, edited, and drawn from etc w/o destroying its relation to the context it's developed in. This can be encouraged by seeing a fedwiki as a project space of content that can be drawn from and remixed elsewhere, in a new codex. Each wiki can then be seen as a particularized response to a rhetorical situation.
I asked Ward about this: does he re-write what he gathers from other wikis, and it's pretty much, No, just edits to suit rather than full-scale refactoring of content.