Looks like they only really started searching west of australia yesterday. By Thursday they expect 6 ships from Australia and the US to be in the area.
This is the search area, its obviously smaller than that huge southern semi-circle, but I guess they think this small chunk (which is still huge) is most likely. Right now its only a surface search, they aren't bringing out the sonar.
edit: correction, 6 planes. they'll be operating in and out of Perth. Australia has 4 search planes, we sent down a propeller-driven search plane that was nearby, and our most advanced search plane is flying down Thursday.
