I might try, if I have a computer with me for most of november (which might not be the case, seeing that I'm probably going to be out at sea for a while).
If I do, it'll be the story of how native oceanian populations discovered the working of metal before europeans ever thought of travelling so far out, and the consequences of such a discovery. Snapshot of a new civilisation spreading in the Pacific Ocean, throught the eyes of particular people living in it. An alternative history of Earth, centered around the ocean instead of the landmasses.
Might be a tiny bit too ambitious.