Comic Vine is a structured wiki for comics. It aims to accurately document the entire world of comics: all the editions, super heroes, teams, and powers. Its 'structure' comes from a structure much like a regular database (as opposed to flat wikipedia pages). Users are able to edit all of the pages. For example, users can add powers to Superman. Anonymous edits are allowed, but logged in users earn points to later make edits instantly applied to the database. Changes are kept in a moderation queue until they are approved by admins, which users can keep watch on until their changes are approved.
Comic Vine is one of the main inspirations for CrunchBase.