More examples of how wikis are used...

Wikis can be used in;

Developing project proposals
Documenting research findings
Writing a report after accomplishment of any activity
Gathering materials for a research initiative ( One will be looking for suggestions or followups on exisiting ideas)
Writing books/novels
Developing teaching materials for educational purposes
Drafting and revising an important email before it is sent
Review and edit a business letter with a colleague