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Twitter briefly showed which sites were embedding which tweets

It's been possible for Twitter fans to embed posts and whole timelines for some time, but authors almost wouldn't know it when they aren't told that the sharing takes place. Users may not be in the dark for much longer -- F-Secure's Mikko Hypponen noticed this weekend that Twitter was briefly listing the sites embedding a given tweet. We've asked Twitter for more details, but the quick disappearance of the feature suggests that the company was conducting field tests. If the addition becomes permanent, it would be consistent with Twitter's desire to track major events -- we'd know just which tweets get the web community buzzing.