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Such chaos hits home for Nova Spivack. Before he started his own company, Radar Networks, the 39-year-old entrepreneur and grandson of late management guru Peter F. Drucker, had so many virtual folders and bookmarks, he'd routinely lose track of important messages and links. Since then, he has watched social news and bookmarking services such as Digg and Delicious (the latter sold to Yahoo for a reported $30 million) garner avid followings for helping people find and store new information.