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Just how isolated are tech pundits like Robert Scoble from the real world? In a telling moment at a "VIP" party for TechCrunch50, Michael Arrington's startup conference taking place this week in San Francisco, an attendee tried to explain Scoble's notoriety to fading film star Demi Moore. Moore was on hand to promote her hubby Ashton Kutcher's new Web show Blah Girls. The actress, like most of America, had never heard of the ruddy, flaxen-haired Fast Company videoblogger. More surprising was Scoble's confession that he hadn't recognized Moore, either. Which makes me think of a new motto for the 250, Valleywag's term for the Valley's self-appointed, self-obsessed inside crowd: "You don't know us, and we don't know you." (Photos by AP/Evan Agostini and Shannon Clark)