It could also be interesting to have some study or writing on certain "edit wars" on certain controversial subjects on wikipedia.
In general, the accuracy of wikipedia is pretty good, and generally wikipedia is still very valuable.
I just wish wikimedia would do more do promote its high quality articles and bundle them per fields to make quality textbooks on particular subjects. It also seems articles are not really indexed per category, which makes it hard to gather articles on a particular subject. Anyway it would involve a lot of work.