er smart accessory-interactive nametags-is particularly useful at large conferences. You program into the nametag various information, such as your name, title, company address, and access numbers, as well as your particular likes and dislikes. As you and another person wearing such a nametag approach each other during the conference, you automatically get a sense of whether you have anything in common to talk about or whether you should simply move on. (Again, such products could result in negative social implications, serving to further divide people rather than providing social interaction among diverse groups.) A new shirt mobile phone is a flexible display screen that ushers in a new type of expression: The image a person wears personalizes his or her clothes to reflect the wearer's surroundings, interests, moods, and SO on. Users choose the type of information they want to highlight on themselves, including drawings, logos, ani- mations, or short messages they either generate themselves or receive from others. The transportation industry is another forum for embedded intelligence. Today's automobiles are increasingly equipped with a host of communications options, including video monitors, navigational systems, Internet connections, mobile telephony and Bluetooth communications built into steering wheels, and, of course, entertainment panels for passengers. No longer is your car simply a lei- sure vehicle. Now it's an office and an entertainment center. One of the interesting things about the notion of smart cars and intelligent highways is that the choice of networking architecture has changed substantially. A few years ago, we were looking toward an intelligent highway system composed of bay stations along roadways that would communicate with the vehicles regard- ing traffic management information and routing. Given the progress we've made in wireless LANs, the infrastructure that's now associated with smart vehicles and roadways involves making each car essentially a node on a network; this is an intrigu