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The next battleground in social networking is measuring influence, not just winning users. Twitter's acquisition of social-media analysis company BackType illustrates that trend.
Too busy to keep up with today's tech news? Here are some of the more interesting stories from CNET for Tuesday, July 5.
Also: The creator of "Buffy the Vampire Slayer" is answering questions from fans on Hulu's official blog; BackType has raised $300,000 and released new features; and more.