"Wiki, Wiki" means "rapidly" in Hawaii. As stated in Wikipedia, "A wiki is software that allows users to create, edit, and link web pages easily. Wikis are often used to create collaborative websites and to power community websites. These wiki websites are often also referred to as wikis; for example, Wikipedia is one of the best known wikis." The 2008 collaborative wiki for the technology class is located here.
Some great places to create wikis: