This shit is quite interesting, especially from a betting perspective.

Japan (rugby minnows) beat South Africa the other day, even tho they were 70/1 before the game.

New Zealand are even moneies to win the thing overall, but they only beat Argentina (not a top tier team) in their first game by a small margin, so it seems like bad value.

As an outside punt I bet Ireland to win outright at 10/1.