take a look at this , page-4

From that article the message is ...
The Rudd government is concerned about certain Australian resources, such as iron ore, where a Chinese stake would mean a control of commodity prices.
Clearly Australia has a massive iron ore resource - and if the Chinese were to gain control of it, it would mean they could bring down global iron ore prices, and hurt Australia.

Oil is clearly an area where a Chinese stake in Australian resources would not have any influence in controlling global prices .
The Chinese would need to they buy out the middle eastern producers in order to do that.

So I cant see the Rudd government and the FIRB being an obstacle to AED - otherwise we wont see anything being approved.

Iron Ore and especially the big 3 BHP, RIO and maybe FMG .. are a special case as we are talking about globally strategic resources and control of global prices and Australia is wise to step in - in this area , and I congratulate the Rudd government for taking that stance , with iron ore.