Semantic MediaWiki
Semantic MediaWiki (.org) (SMW) is a free, open-source extension to MediaWiki that lets you store & query semantic data within the wiki and it seems well suited to Consumerium's information infrastructure needs.
See also
- Database for a higher level view of what is going on with the databases
- DBpedia the original structured data harvesting effort for the MediaWiki wikis
- Wikidata and the underlying Wikibase extension