The choice of a host site is an extremely important decision.
The basic choice is between a "wiki farm" (a site which specializes in wikis and hosts many) and a site belonging to some benevolent party (company, university, local/regional SUG, ...) but which has little or no wiki infrastructure and expertise.
There are sites (such as wikipedia.com or wikifaq.com) where a single page could be added to an existing wiki, or information could be added to an existing page. This would probably be too confining.
- Web Hosting UK - Cheap Wiki Hosting Solutions.
- Netherweb Clustered Webhosting - Cheap Reliable Hosting Solutions.