Drilling deeper: Niche 'vertical sites' refine Web searching

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  Two years after Merriam-Webster formally recognized "google" as a transitive verb, consumers are recognizing the limitations of Google, Yahoo, Microsoft or Ask.com, whose "horizontal" searches deliver vast breadth of information but not much depth. Increasingly, people are "drilling down" into highly detailed and structured sites like Retrevo for consumer electronics; Trulia and Zillow for real estate; SimplyHired and Indeed for jobs; Kayak, Farechase and Farecast for travel, and so on... more