Just read that Telstra are giving unlimited data to their Air wifi until June 30 Sep 30 2016 for Telstra customers!!
Awesome!!!!
From News.com.au article:
Telstra launched the Telstra Air Network in June but there were several catches to using it. You had to be a Telstra broadband customers, you could only log on for 30 minutes at a time and the data you used was counted against your home data limit.
From today, when Telstra customers log on to the network, they will not have any data caps or time limitations and any data they use will not affect their other accounts.
For non Telstra customers, see realfancyman's forum post on how to obtain the deal via a $2 sim card.
Update 21/4: Deal has been extended from June 30 2016 to Sep 30 2016 (thanks creeps_bay).
It is pretty simple, follow the Orange and red colour coding on the Telstra entry point site. Mobile customers can be a guest, home broadband customers can be an Air member.For the former you need mobile service associated to your Telstra ID.