The other option you have is Prepaid Telstra iPad data sim NVRENUF.
Only pay as you go.
Telstra Pre-Paid micro-SIM for Apple iPad
I've got the 12Gb one & I've hardly used any of it. About 3.2GB in last 4 months. I use it for Emails abroad, surfing the net & watching a few NHL games Live. Being on Telstra also the quality actually handles pretty well. We shall see how it goes with the "New" iPad & its increased Resolution = More data & bandwidth
