Hello Jeremy,
as Craig said, I think you mean Mediawiki :
- Wikipedia : the well-known encyclopedia project
- Wikimedia Foundation : the foundation running the servers of the 
previous project (+ some others) and managing infrastructure / legal / 
funds and so on
- Mediawiki : the open source software running all Wikimedia Foundation 
projects, available as an open source product.

Mediawiki is built on PHP/Mysql and can easily be installed on almost 
any hosting provider, but depending of the plugins you want, maybe you 
will reach limitations of the lowcost hosting offers. For example, if 
you want to use one of the biggest Mediawiki improvement of the last 
year, VisualEditor which allows your user to contribute to the wiki 
without knowing the wikicode ([[link]], '''bold''', == Title == ...) you 
have to install an extra tool and that can be tricky on some hosts : 
https://www.mediawiki.org/wiki/Extension:VisualEditor )

Hope this helps.

Sylvain

Le 16/12/2014 01:28, Jeremy C. Shellhase a écrit :
> Does anybody have a recommendation for a hosting service for Wikimedia?
> I'd normally think of installing something like this locally, but our
> centralized IT isn't up to the task and I have no staff or servers anymore.
>
> I'd like to be able to use plug-ins that I find and be able to use our
> campus' CAS/LDAP for authentication instead of host-based.
>
> We're just looking to replicate the internal communication services of an
> intranet web server for a small (31 person) Library.
>
> Happy holidays to all.
>
> Jeremy C. Shellhase
> Systems Librarian *and*
> Bibliographer/Instructor for Business, Economics, Education, Child
> Development, Psychology, Social Work
> Humboldt State University Library
> One Harpst Street
> Arcata, California 95521
> 707-826-3144 (voice)
> 707-826-3441 (fax)
> [log in to unmask]