Pete Ashdown's campaign for U.S. Senate against Orrin Hatch in Utah, has been using a MediaWiki based wiki since November 2005. As of mid-July 2006 it appears to be getting an edit every day or two and its a statistics page has details on its operation.
Hammer 2006 - help organize and spread information about Alex Hammer's 2006 run for governor of Maine Alex Hammer is thinking about starting a wiki in an Independent run for President for 2008. Email Alex in regard to how you would like to become involved at hscpub@aol.com.
General political campaign Wiki systems[]
The League of Technical Voters has a wiki that is being used to organize a meetup in Austin Texas for a code-a-thon on October 13-15th 2006. They plan is for 100 coders to work on Drupal modules for use in political blogs. Many political websites run on Drupal. There is a page for suggested modules that you can look at and edit. The password to edit the wiki is "transparency".
InformatiePartij (in Dutch). This is a political party focusing on information technology and climate change.
Information Party, the start of an international version of the former.