This is the most promising app for education that I have seen so far in the app store: WikiServer. The interface is crap and not well-suited for a tiny screen, but the idea is great.
WikiServer does what it says on the tin, it installs a wiki server – on your iPhone. Other people on the same WiFi network can easily connect to the same wiki and co-edit pages. This is really cool, and I can imagine lots of different (campus-based) group work activities, that would instantly enhance teaching and learning. Imagine, for example, students in a lab working on some project (at different tables), sharing their findings via such a wiki. You can also connect from a normal PC browser, so it’s also platform independent. How wonderful is that!
Shame that the interface is not geared up for a small mobile screen and big fingers, so the in-line editor is really unusable, and when the keyboard is up, you can see even less of it. These are things that should be fixed, but I guess on an iPad it already works much better.