Best Sim card for 1 month in Australia

Hi guys,

If any of you think you might have any input for which SIM would be best to get whislt holidaying in Aus, I'd appreciate your feedback over in the mobile forums!

Thanks! :-)

http://www.theverge.com/2012/11/14/3643968/1-month-holiday-in-brisbane-sydney-melbourne-which-sim-shall-i-get