Wiki Help/Wiki Macros/Contributor List
[[ContributorList]] presents a list of all the recent contributors to the wiki, including the default anonymouse name (MysteriousStranger), and sorts it by the number of contributions. See WikiTools/ContributorList for an example of this macro in action.
Recent has a particular meaning here. As you may know, older version of all pages in this wiki expire after a while and dissapear. When they do, everything about them also goes away, including the contributors who signed those versions. So recent contributors actually means contributors whose signatures are still present in the log.
This is a somewhat controversial kind of statistics in the wiki world. Some people feel that a list such as this may encourage quantity over quality.