Niall Kennedy at Social Graph Foo Camp, February 2008
summary
JavaScript uses browser styling to detect visited links via CSS/javascript and iterate a curated list of roughly 30–50 aggregator/bookmark targets to find about five sites a user actually visits in the last 7–9 days. Once detected the page swaps generic subscribe or share options for branded actions (Add to My Yahoo, show Dig counts) and reports higher engagement and conversion; results are cached with a cookie users for 30 days rule. Code bundles and base libraries are slated for open source.
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