Areas is a new category that I created because ther were some pages speaking about interesting places. I found this approach interesting but there is no link to them from main and reference pages. we have much more information regarding Geography wuch will be categorized too, but the work is at it's begin. The categories themselves have to be linked to and a bit better documented.
We have pages about maps but their access is rather obscure at the moment, some of them belong to development concepts, none were designed for player reference. All these pages will be linked to from a "Geography" point on the main page. I am working on it at the moment. You must know that part of it is only a concept and is not yet developped, and this is why it was not included in player information as the actual content is (which was priority one of course).
http://wiki.themanaworld.org/index.php/Geography
http://wiki.themanaworld.org/index.php/Tonori
http://wiki.themanaworld.org/index.php/Argaes
http://wiki.themanaworld.org/index.php/Kaizei
About mobs:
I don't think each mob needs to have it's own page except if they are worth a topic because of the game concept, history development originalities...
These pages were here, written by players who had some intention that I don't know. I found useful to standardize the layout and gather this information in categories which makes access to them easier.
Maybe monster families could be defined, either by shape, by behaviour, by utility, by dropped items, by place?
for example, herbs have an evident utility, a page about them would be useful which could include geographical information about them ( there was some map for that purpose if I remind well).
Multiple collaborators are not a problem and it is the natural way of creating a wiki. However, contributors have to collaborate and freely comply to the standards that have been chosen before; any change leads to considerable update work, such as the one that Ali-G did. The player information part is mainly a spoiler at the moment. I think and I try to improve Ali's work with a "backgound information"/story/context to make it a bit more fat and give guidelines to start the quests, and spoil only if they are stuck.
There are very little scripts at the moment, though the tools are here.

Atthe moment I focus (for this point) on making sample pages, templates and categories and their usage documentation to make the contributors' task (and maintenance too) as simple as possible and focus on their text rather than on page layout and wiki/html code (skilled contributors are welcome though

).