As for Wikis, ermm…can’t help really. Sorry.

Can I have bonus points for most useless comment of the day?

http://www.atlassian.com/software/confluence/

Each project has it’s own section. Here we include everything from system architecture documents, user guides, requirements documents, timelines, project status, release details, promotion instructions, meeting minutes, etc. Pretty much everything. Some of it is added inline, and some of it included as attached documents.

We also have other sections for administration (timesheet and travel expense outlines, shopping lists, etc), our development process (such as how to set up your development environment, what programs, detailed instruction guides, etc), interesting reads (new technologies, good practice guides), and everything else we need to share.

It has a handy feed of everything that gets updated and shows who updated it (and which part of the document they updated). You can reach it and log in from anywhere too, so you’re never stuck without an important document.

I definitely prefer this to just having documents spread out on a network somewhere. It’s easier to keep track of everything.

I’m also considering using TiddlyWiki as a personal wiki, to keep track of everything in my life. We’ll see, though.