codex.bp.org is a standalone installed themed to look the same.
I’m looking for this feature as well. I think it would be good in the groups section to have a sub section called Pages. Right now you can enable pages by using the Group Blog plugin, but then you get blog posts, and pages as a sub section of that.
anyone know of a way to just get the pages. maybe an alteration of the Group Blog plugin to pull the pages out into the menu. ideas?
@Xevo:
Andy has installed on the codex a very quick and simple way to modify the individual pages of the codex. It’s a customized setup of sorts, but it’s really just another WPMU blog that everyone has the ability to edit.
In future versions of WordPress (probably 3.0) posts will become more robust and be better suited for something like this. Until then the codex is basically just pages and sub pages with a theme that knows how to make sense of the hierarchy.
Well, I’m only interested in the edit function and like I said, simplicity is the way to go. I’m already just using pages and sub pages for my current setup.
But I’ll try recreating it myself. When will the future version (3.0) be released, this year? If not, then I cannot wait for that to come around.
Thanks for the help though, hearing that it’s just a blog on the wpmu system, lets me know that I dont have to install a standalone wordpress to accomplish this.
If someone has suggestions on how to do the edit function or still is willing to make a plugin, please let me know.
3.0 won’t be until next year unfortunately. 2.9 will be by the end of the year with a beta coming soon.
I found a solution to this problem of mine in a VERY easy way.
I made a second blog for my admin called encyclopedia, then uploaded the plugin “wp wiki” by instinct. Then I went to “Site Admin > Blogs > Back end” and activated the plugin on the encyclopedia blog. Now I have the wiki plugin on this blog only and it works fine.
The only thing left to do is make a template for this blog. And it’ll look like its part of the rest of the site (I don’t use the buddybar).
For all those others that are looking for an easy way to make a wiki/encyclopedia. Try this. 
Do users have to log into the wordpress backend in order to write a wiki post, or is there kinf of frontend editor?
For wp wiki, you have to use the backend editor, since it’s officialy made for single wordpress. But since you have to/can make a different theme for the blog, you could try making it front-end.
Edit: I found an easy solution for this as well, there’s a front end editor plugin.
https://wordpress.org/extend/plugins/front-end-editor/screenshots/
