The New York Times writes:
Mr. Herrick is hardly the only entrepreneur inspired by the efficiency and low cost of what has become known as the wiki model. Although Wikipedia is operated by a nonprofit foundation, ideas for advertising-based wiki sites are beginning to take their place alongside blogs and social networking sites as a staple of Silicon Valley business plans.
In addition to Wikia, a site devoted to topics judged too esoteric for the online encyclopedia, there is ShopWiki, for product reviews, and Wikitravel, for tourism advice. Several start-ups allow users to operate their own wiki sites.