Apple’s iPhone and iPod touch are becoming the electronic handheld devices of choice for U.S. military overseas, according to a new report. Newsweek reports that the iPod touch, and to a lesser extent the iPhone, are gaining popularity thanks to their relatively low cost compared to custom-designed mil-spec devices, their ruggedness when sheathed in protective cases, and their versatility. Since both devices can run a myriad of different apps,…