Knowing that Smartcards have serious security features incorporated into them, I find it hard to believe that this type of attack would be sucessfull against a smart card. Take into consideration that most JAVA cards have current sensors built into them that automaticaly reset the card if 'unnatural' conditions occur on the card's circuitry. Heck they even have light sensors that erase the secure storage locations on the card, if the device is tampered with and exposed to light. I think that seeing is believing when it comes to this type of attack...