authors can collaborate on stories through wikis as a form of docu-ment hosting. Any number can take turns editing a text, adding, delet-ing, or modifying words.
I think it would be very fascinating if we as a class got to do a wiki type blog. For example, a problem could be given to the class and everyone would have the opportunity to go into the blog and edit the answer to their best knowledge. Although it would turn out to be annoying to the students, the instructor could just sit back and watch how his students think and get an idea of how informed his students are pertaining to that topic.