I am currently thinking about a new kind of wiki especially designed for the education. The students will be the main contributors and the main readers too. A tool able to extract some statistic concerning the text, to classify and to provide automatically a short summary will be useful for the instructor and the reader too.
I think that TexLexAn after some modification (to make it able to understand the markup language of the wiki) will be able to do the job.
If you are interested in my project of Educational Wiki (I called it "Academic Wiki"), you will find the detail of the project here: http://learnexperiment.wikidot.com/