The most popular locations for the Australian Diaspora are Western Europe, Britain, North America and Northern Asia.

Larger version of graph. The diaspora is largely an economic one following a mix of economic wealth and low barriers of entry to the international labor market - ie New Zealand being popular. Nationalism is a restriction on the fluidity of the diaspora and global labor market. (reply)
Interesting article in the NYT on the Lebanese Diaspora coming home for christmas and challenging the political, military and economic paralysis of Lebanon. The article ends with:

These migrants supply Lebanon with about $1,400 per capita every year, Mr. Ghobril said -- one of the highest rates of remittances in the world. Those transfers are one of the pillars sustaining the consumer economy, he added, though they do not make up for the country's soaring public debt, the lack of long-term investment here, or the slow bleeding of the country's main natural resource - its people.

But there is another way of looking at it.

"Perhaps instead of talking about brain drain we should talk about brain globalization," Mr. Ghobril said with a mischievous grin. "The globalization of Lebanon."

Through history Diaspora's have put political and economic pressure on existing systems. Hopefully the Lebanese Diaspora, of which there is a large contingent in Australia, place similar pressure on the poor state of affairs in Lebanon. (more)
While the Australia diaspora is high in per capita number the American diaspora is high in raw numbers. For the first time ever a US Presidential candidate is in the UK doing a fund raiser. Apparently there are large numbers of US diasporans working in the London finance sector and Rudi Guliani has decided to do a fund raiser there while cloaking himself in the ghost of Ronald Reagan by meeting with Margaret Thatcher. (more)

John Barrdear , a diasporan economist based in London, has started writing more regularly. Which is good as his posts are of the same high quality that the Australian economist bloggers seems to produce with unnatural ease. (more)

Interesting wikipedia article on diasporas .

Diasporas are thus understood as transnational political entities, operating on "behalf of their entire people", and capable of acting independently from any individual state (be it their homeland or host states.)
(more)
Cam Riley: South Sea Republic. Freedom, liberty, equity and an Australian Republic.