As we hurtle into the twenty-first century, will we be passive downloaders of content or active uploaders of meaning? The computer, writes Peter Lunenfeld, is the twenty-first century's culture machine. It is a dream device, serving as the mode of production, the means of distribution, and the site of reception. We haven't quite achieved the flying cars and robot butlers of futurist fantasies, but we do have a machine that can function...