In my Intro classes last fall, the idea came up of using a wiki to go along with discussion on the book of Proverbs. The idea was to post the "proverbs" from the book of Proverbs, and then let people add and delete or modify to create an ongoing, contemporary book of Proverbs. Unfortunately, the spirit was more willing than the flesh. I never seemed to have the time or energy to go beyond that.
The January Intensive class on Quakers and the Bible set up a non-class related Moodle site on the topic for ESR (and maybe others) to participate in. And there's one wiki there. It gives a George Fox text and asks folk to identify biblical allusions/echoes. So I could imagine creating a group document using wiki. But I haven't actually physically worked with a wiki yet.
I'd be interested in knowing your experiences if you use these in a classroom.
These are my few experiences.