Emacs Wiki links
There is a certain lack of documentation and help forum for Emacs Wiki, though. As a newbie, you will ask yourself questions. Here is an attempt at writing a EmacsWikiForNewbies.
What is cool about Emacs Wiki?
You only need GnuEmacs, i.e. no CGI, no database, nothing!
Everything is static. And it is very easy to author if you know a few things about Emacs. And if you don't know much about GnuEmacs, you can check out TheEmacsWiki.
Some notes
RssSyndication
I have developed RssForEmacsWiki.
Publication
I publish stuff with CVS, using my recursive CVS add and commit tool.
Similar easy publication tools
I personnally prefer EmacsWiki because I can do everything easily from GnuEmacs. Need to talk to Aaron at the Technical Plenary in case he attends it.