Lesson Plans

Some of you have commented about the idea of a wiki being more appealing than a normal assignments and I have to agree. I've been thinking that I want to do my lesson plan on wikis. I think something like our ITSopedia that is a great source of review for all that we have learned would be good in any classroom. It gives the students a place to hopefully get answers on whatever they have questions with. Now I just need to think of an authentic problem. I can see the wiki being the "clear outcome" - a compilation of their efforts. They could be creating this collection for.... online homework help site? Help others studying the same thing?