The absolute best in Australian Poker can be found at these trusted poker rooms:

Bet 365 - Our most recommended poker room offers players more than the competition. To start off they have a huge sign up bonus that new players can claim. They also have the VIP program a rewards program that stands out for offering loyal players more. 
They have easy to use software that makes it easy to focus on your poker game. Should you win they pay out winnings fast.
They offer 24 hours a day 7 days a week customer service.

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Party Poker - This as seen on TV poker room has paid out billions of dollars in winnings to players all over the world. They are trusted and publically traded in the United Kingdom. The level of transparency this company endures ensures that your money is safe. 
They offer more tournaments than anyone else including freerolls, satellites, and huge multi million dollar guaranteed tournies.
They of course offer a high level of customer service.

Mansion Poker - A great brand that offers a solid poker product. Last we checked over 2000 simultaneous players were online. They are licensed in Gibraltar which has high standards for all online gambling operations.
The Club Mansion rewards program is one of the best in the industry. There also offer new players a 200% sign up bonus.
Well recommended.