Best iphone / ipad deals in australia for data and calls?

I'm heading to Australia for 3 months and would like to know how to best manage my data / phone costs across the devices we're taking. I understand that a Telstra sim allows free tethering but the data rates seem really expensive. Alternately, I can use voip on my iPad but then we can't connect our 2 laptops. The personal Wi-Fi dongle's look expensive too. Any expert advice?

You should select a provider that has strong after sales support. I would recommend http://www.axvoice.com/ as you can use this service on your smart phone, computer and ordinary land line phone set. Axvoice's configuration process is easier than others. In case, there's any problem, they have a very efficient tech support system to solve that issue. Above all, you will get unlimited incoming and outgoing calls for $8 only.