$100 rental fee, I don't think so. I have a feeling I can use my iphone as a wifi modem for the the ipad. I have PDANet and that is one of the features. I'm hoping that someone will try it and post whether it works on macrumors or some other site. If it works, then I will likely just keep the wifi. I probably do not need the 3G in any event but I don't mind spending the $130 for the option.