Just had to recharge our Aussie Calling Card - we've always used Daybreak Cards in the past but when I had to speak to a Customer Service person tonight to register a new credit card, turns out the rates are now 4.5c per minute - compared to the 1.5c per minute it has always been in the past!! Don't know when they sneakily changed that, but thought we'd been going through our minutes quicker than normal! They did offer to change the scheme to a cheaper one, but wanted to charge us a $29 sign up feefor the privilege!!
Anyway, a quick google search has come up with Australia Phone Cards- Find the Cheapest Phonecards in Australia which are charging only 1.5c a minute with no connection fee, and more to the point no ridiculous "sign up" fee - plus you can speak to a real person (their customer service people are on 02 9283 9292) and pre-register your home phone number so that you don't need to put the pin number in every time.
Thought it might be useful info for someone - and if you're still using Daybreak, check the rates!!