How do I sign up for British Airways Executive Club in Australia?

I just finished reading the great article from Point Hacks regarding Avios Guide to buying Avios with British Airways and Iberia - Point Hacks

I clicked through to British Airways and tried to register for the Executive Club membership as recommended in the article and got an error:

“We apologise, you cannot enrol in the British Airways Executive Club in your proposed country of residence. click here for details.”

The article was great, but if Aussies are completely blocked from participating, kind of defeats the purpose. Any suggestions?

Hi,

Hope this recent question would help.

Do I need to be a UK resident to register for the BA Executive Club?