If there's one thing that can be said about the rules surrounding whether you can use a mobile phone GPS in your car, it's this: they're not at all clear.
The latest twist is that Victoria has decided to abandon plans to make phone-based GPS devices illegal, and instead allow them provided the device is in a cradle and isn't being used for other visually distracting activities like texting or watching video. Cade Lucas at The Age notes that the new rules, which apply from November 9, will carry a steep $234 fine if the requirements are ignored.
As Nick over at Gizmodo points out, the decision seems like a victory for common sense, but that doesn't mean the same rational approach will apply nationally. That said, if your phone is in a cradle, you should at least have a case to argue in other states.