Nikki,
>
> One of our local town halls has asked me to implement a wiki-based
> website dedicated to ecological farming. The wiki is supposed to host a
> variety of documents in text, video and audio format.
>
> I've never used any wiki engines myself. Is there any one you can
> recommend in particular ? I'm using CentOS 5 on the server, so I would
> be glad to use a solution where I don't have to jump through burning
> loops (e. g. install a more recent version of PHP/Python/whatever) to
> make it work.
mediawiki is always a good choice. That's what wikipedia runs on, and may
be slightly more involved to install and configure than other, lighter
weight wikis, but it industrial strength.
In addition, it's not too hard to add some security - where I was working
a couple of years ago, one of our developers knocked out, in short order,
an area that was only accessible by password.
mark