How To Set Up the Wiki
Depending on your institution's setup, you may have a choice of either internal or external wikis. Just like with blogs, there are advantages and disadvantages to both.
If you use wikis for small group projects, it may be helpful to have a "landing page" for all small groups from which you link to a separate page for each group. Include the names of students in each group on the landing page so participants know exactly where to go.
Here are some examples of wikis from PLS courses. These are external wikis, but may give you some inspiration on how to set up small group pages for either internal or external wikis.
For technical information on the Sakai wiki, review topic 3-B in the Sakai Tutorials course.