Sherry Turkle is at it again. This Friday, she's hosting a daylong powwow at MIT to discuss "Evocative Objects." The front of the brochure includes pictures of an electric guitar, VW Beetle, rubber duckie, and a pipe. "Objects bring philosophy down to earth," she says. Over the past two decades, the founder of the MIT Initiative on Technology and Self has been watching how our relationships with machines, high tech and low tech, develop. Turkle is best known for her place at the table in any discussion of how computers - and robots in particular - will change our lives. This makes her an essen...