Both edutopia and teachersfirst offered many great examples on how to use a Wiki in the classroom. As a history teacher, I am considering using a Wiki for the following assignments that I have done in the past, "the old school way":
1. Mock Debate on a person or issue.
2. A travel brochure on a country or state.
3. Movie / Book reviews.
It seems as though many teachers use Wikis to challenge students to discover information more independently. Students can make their own Wikis and learn both content and research skills.
Drew