BlogPulse’s name should be a clue as to its function — it’s a blog search engine that provides trend data. It is owned by Nielsen, and its tag line is, “Discover what’s hot.” When you go to the home page, you find tools to search trends, view featured trends, mine conversations for trends, and review profiles of key bloggers. Some consider this tool to be more powerful than Technorati because it enables you to track trends and analyze data at a deeper level.

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