Sent today. Let's see if airmail to Australia is worth the extra cost. (Actually only about $10 more.) As the postal clerk explained it, the ship always takes the same length of time to Australia - about two weeks. But they don't dispatch it the moment they have my letter onboard - the container is only shipped when it's full. If you're lucky, your letter is one of the last loaded on and it sails immediately after. But if the ship has just gone, and your letter is one of the first into the new container, you have to wait until it fills up again. That can take a month or more.