Looks like Dick Smith has an online offer worth considering.
Until 17th of January, or while stocks last, you can get a $100 iTunes gift card for $75.
It is limited to 2,000 cards and shipping is free.
[Source: Dick Smith via OzBargain via Lifehacker]
Other known gift card deals:
[20%] Harvey Norman – 20% off iTunes cards – ends 27/1
[15%] David Jones – 15% off iTunes cards – ends 30/1