BuzzMachine ? Blog Archive ? Web 2.0: Tagging: “Catarina talks about a new metric Flickr uses: interestingness, which tries to capture how much people have seen, tagged, linked to something. And she says you can pivot that around a person or a social group: What interests them? Add that to the metrics we as an unmedium need to capture and deliver: Where’s the good stuff? That’s where we want to be (and advertisers, too).”