Yahoo is embracing social networking and link-sharing more than its breatheren -- so much so that it's referring users of Digg-clone Yahoo Buzz to competing sites like Digg, Stumbleupon and Facebook. Nothing like a social link voting site referring users to another social link voting site to create some circular traffic flow. I did something like that with Fark and Digg once -- thank goodness, the Internet didn't blow up.

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