"Do you believe that spending $15,000 on a media center is vulgar, but that spending $15,000 on a slate shower stall is a sign that you are at one with the Zenlike rhythms of nature? Do you work for one of those visionary software companies where people come to work wearing hiking boots and glacier glasses, as if a wall of ice were about to come sliding through the parking lot? If so, you might be a Bobo. In his bestselling work of "comic sociology,"...