Something Wiki this way comes:
Everyone has unique knowledge and ideas. Suppose there was an easy way to capture the wisdom of every member in a group or community, then perhaps the collective intelligence of the group would be increased. This is the most powerful benefit of a wiki.
There are many wiki on the WWW which vary in features and intent. The Schemely Wiki intends to promote the Scheme programming language.
http://www.oreillynet.com/pub/a/network/2006/07/07/what-is-a-wiki.html?page=1