Up until know, my knowledge of Wiki was limited to Wikipedia and Wiki Quotes.
George Siemens recommended the Open Content Textbook "Web 2.0 and Emerging Learning Technologies". Wikibooks are a whole new experience for me. Like Wikipedia, wikibooks are in process of being created with people adding and editing content on an ongoing basis. I'm putting the link in my blog for anyone who is interested in seeing an example of an Open Content Textbook.