Here's a dose of something that you might have heard before, but it's coming back to light today. Facebook, in a recently-released video that highlights some of the photo tagging features, has shown that it's still testing a feature that will allow you to "Subscribe" to someone's updates. Call it following without friending.What's interesting about this is that not only has Facebook been testing the feature since September of last year without it rolling out, it works a lot like circles on Googl [...]

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