Wiki projects!

One of my favorite tools that I learned about at NCETC 2007 were wiki's.   I thought that one excellent use would be for a teacher to start a wiki with a simple paragraph or page about a general topic.   Within the paragraph, many of the key words should be created as links.   These keywords are then assigned to students who would research the keywords and fill in the wiki with data related to that keyword.   I think this could be an amazing way to carry out a research project with students.   I don't have anything concrete for this yet, but I would like to create a sample page.   Most of the implementations for this idea so far relate more to subjects other than Math.   I might develop this idea for Science or Social Studies first.   As a second effort I would like to adjust the idea to fit Math somehow.