Implantable medical devices and methods use an intravascular implantable medical device having an elongated housing module to contain one or more circuitry components. For example, a transistor device includes an insulating substrate and a gate electrode embedded in the insulating substrate. Access to predetermined Internet-based services or sites can also be had as an award to an individual for inputting an iconic code at a machine connected to the Internet if the input code tests as valid, with the code being marked so as to be usable only once.