Portable electronic devices like the Amazon Kindle, the iPad, iPhone, Android, Windows Phone, and Blackberry devices all have "airplane mode" built in to the devices software that minimizes the electronic signals these devices emit.
To date, there is no evidence that electromagnetic interference, in any way, affects aviation equipment. Studies to date conclude that there's little risk to allowing electronic devices to be used during takeoff and landing. Despite passengers "bending the rules" or forgetting to turn off devices on planes for years, there's been no known incident of an air accident caused by electromagnetic interference from devices.
Allow devices that have "Airplane Mode" to be used during taxi, takeoff, and landing through revising FAA regulation.