Did a quick search, it's called SatTraveller there's some info here: http://www.optus.com.au/business/broadband-internet/networking-solutions/satellite/voice-data/sat-traveller
On the page there are 3 "Dish" options but I couldn't find any links to pricing, seems you need to contact Optus for more info. It looks like it's designed for business use, so probably cost prohibitive for private use.
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Steve, Di & Ziggy We named our Motorhome "Roadworx" because on the road works "On The Road Again" Ford Transit with 302 Windsor V8 conversion, C4 Auto, 9 Inch Ford Diff All Lighting L.E.D., 260 Amp/h AGM, 530 Watt Solar + Kipor Backup Gen.
NBN are launching some satellites this year to provide internet services to isolated people. Unfortunately a fixed address is required so those traveling through isolated areas are not eligible for the connection.