ElWiki(.com) is a Mediawiki-based wiki hive where users can create their own Wikis for free.
"ElWiki is a collection of Wiki-based knowledgebases on a variery of subjects. Users may create a Wiki on any subject - and we'll take care of configuring, hosting and maintaining the site free-of-charge!"
List of elwiki.com Wikis
External Source, dynamically sortable to any criteria, self-updating every six hours by cronjob
External Source, generated wikisyntax
<wikistats type=elwiki></wikistats>