Resources
Classroom 2.0 wiki on wikis

This is a wiki :) a web-based tool that trades simplicity in design for sophisticated multi-user publishing capability--all from a common web browser.

Definition and Information
Wiki is a Hawaiian word meaning "quick"
http://en.wikipedia.org/wiki/Wiki

wikibooks
There are many different applications using wiki. One resource I found is wikibook. This is a wiki where people are creating open context textbooks that anyone can edit.
http://en.wikibooks.org/wiki/Main_Page

Uses of Wikis in Schools
School newspaper
Daily Bulletin
Parent newsletter
Post school sports schedules


Other Uses

Minutes of meeings