Wi-Fi tethering is one of the most prominent features for iPhone users in the iOS 4.3 upgrade, and Australians don't have to pay extra to use it. But if you've been using the long-in-place Bluetooth tethering option, is switching to Wi-Fi a better bet? Nick at our sibling title Gizmodo investigated, and concluded "not really".
Nick compared tethering performance on his daily train trip using Bluetooth and Wi-Fi, and found that there were some performance variations that favoured Bluetooth. That said, the available speed varied so widely (something I've also found when using any kind of 3G network on a train) that it might not make a huge practical difference. Hit his post for the full set of results.