The concept of a Wiki may seem strange at first, but dive in and explore its links. Wiki is a composition system; it's a discussion medium; it's a repository; it's a mail system; it's a tool for collaboration. Really, we don't know quite what it is, but it's a fun way of communicating asynchronously across the network.
I've come across the site a year or two before but I never really played around with it that much. But today I came across it again and this time, I decided to play around with the concept, which seems to be what Tim Berners-Lee invisioned the web could be—one were you can view and edit the pages you see.
Okay, maybe he didn't mean to edit any pages you yourself didn't author but there aren't many sites out there that will let you arbitrarily edit their pages, yet these sites allow you to edit their pages.
But while cruising the WikiWikiWeb, I thought that such a hypertext system would be perfect for computer documentation for a group or organization—you install the documentation on an internal website (or external website if you really want to live on the edge) and as people peruse it, they can annotate (or even correct!) the documentation to acurately reflect the true state of affairs.