New York, NY Had a two-minute conversation with Tim O'Reilly yesterday, standing in one of the wide, wide hallways of the Javits Center where his Web 2.0 Expo took place this week. I knew from his bio that he was a Harvard grad and asked him what year he graduated. '75 or '76, he said, depending on how you qualify it. That's my era at Harvard (I'm class of 1974). But Tim went through in three years, hence the date confusion. He