Much of Australia's $22 billion gambling addiction has been well documented, poker machines, table games and wagering are all hugely popular with the punters. But what about online casinos? Untaxed, unregulated and under the radar, this so-called "unofficial" sector of gambling is increasing in popularity.

According to the Productivity Commission, the wild west of unregulated online gambling could be worth as much as $800 million annually. Industry experts recently pegged the number as high as $968 million -- with a third of that funneling into online poker.