I am looking into buying an iPad. To save the $130 for buying the 3G model I am thinking of just buying the Wifi model, then jailbreak my iPhone, use the MyWi app and tether my iPhones 3G to the iPad. I am worried however that eventually Apple will figure out how to permanantly block jailbreaks and then I have spent $500 on an iPad that won't do what I wanted it for(internet on the road).