At moment it's meant for personnels of information technology department. You can use it anyway you want for anything you want which is related to your work here.
First, it's visible to internet and by default anyone can read it but editing is allowed only for personnels of information technology department. It's possible to use groups from university authentication system to restrict access to certain parts of wiki.
First you should think about the visibility of your material. Wiki is public information collaboration system, so if you have private material so what is the point to put it into wiki. Anyhow wiki can be also used on projects and works as a material communication exchange storage very easily and with docuwiki it is possible to limit access to namespaces.
It's possible to use normal account and groups available in university authentication system to limit visibility or edit rights. It's possible to control access either namespace or page level.
Sure, but it must be authorized by department personnels, it's possible for give students access ex. for specific course areas for making collaborative works.
How about non-LUT students ? No, it's not possible at moment, you have to have account at our university to do editing here.
Sure, you can run your course pages here, but in future we propably are still providing course index and main pages. You can link from there to this wiki.
If you are not sure or you don't care put it into common namespace. The idea of the wiki is to promote collaboration. Conflict is good for wiki, because it makes people think and improve the content by different viewpoints. Also forming live content is easier in single namespace.
Almost anywhere you want, but remember that you can use namespaces to arrange your content logically and control access for your content. I suggest following major namespaces to be used:
Recent changes within whole wiki
Recent changes within specified namespace
Following plugins are isntalled to this wiki and few more which are needed to run these plugins. Only these plugins are supported and tested in our theme and layout.