Don't have much info on the movie, but I do know it should start getting filmed pretty soon. I know the crew made a doco which was released here on the history channel on the anniversary of the battle, and from the few re-enactment scenes I have seen, the movie should look pretty good. Don't know the cast yet, but the papers reported months ago that the likes of Bryon Brown, Sam Neil, Russal Crow and a few other well know Aussie actors were going to star. Whether this is true is another thing, knowing what the papers are like!
But your right, should be a bloody good film that hopefully portrays what these brave fellas went through.