Wiki as a PIM and Collaborative Content Tool by David Mattison, Access Services Archivist British Columbia Archives, Cananda.
A rather nice article on overview of Wiki systems. Right from the concepts and terminology, to a quick overview of the available (open source) wiki products, their useability and so on. Also, some thoughts on where the collaboration technology is headed - especially the academic projects.
Duly recommended to anyone who wants to have overview about wiki system of collaboration.