Thing #16 Wikis

The only thing close to wikis that I am familiar w/ is wikipedia. I'm planning on using wikis for a group project. My students will love it b/c they can coordinate w/ all group members and be able to gather facts quickly. The best part about wikis is that if a student thinks a fact or statement is incorrect, then they are able to edit the paper. This is an easy way to see that all team members are contributing to the project.
I do have concerns w/ having little control over editing. I can see some of my students getting into "editing wars" and making derogatory comments. Same thing with the content that is being discussed. How do I manage that? Do I include myself to the wikis page so I can manage what is being written???