Tap into that keg with a KegLand keg coupler. A-Type and D-Type are the most common found in Australia, also known as a German Slider (A-Type) and Sankey Coupler (D-Type).
For ABinBEV brands (VB, Carlton, Fat Yak and other CUB) or Mountain Goat and various other microbrewies then D-Type is the way to go.
For Coopers and Lion (XXXX, Tooheys, Little Creatures, Boags......) you might prefer to go with an A-Type.
Some other beers like Asahi and Heineken are often found with S-Type couplings.