I have a question I have been wanting to ask a knowledgeable Bradbury fan for years. I remember reading a short story many moons ago in which Bradbury described a future society in which people walked around with miniature radios with little antennae "quivering," and they were totally oblivious to the world, which, of course, pretty much describes today. Does anyone know the story and which book it is in?

Well, not exactly antennae quivering, but in Fahrenheit 451 lots of folks have "seashell radio" plugged in their ears...
Better read this book soon, Yank.