Just noticed that the 3.0sd can now be chosen at
http://www.bmw.com.au despite it not being listed with the other engines in the specifications page. There's no 'Executive' next to it's name but it's priced exactly AUD$6500 over the 3.0d Executive which suggests it's Executive spec by default, since AUD$6500 is the exact premium over the 3.0d listed in the 3.0sd dealer bulletin.
Wonder how long it'll be before it shows up as an available engine type in the spec page.