Like This? You'll Hate That. (Not All Web Recommendations Are Welcome.) - New York Times

"On Amazon.com, a customer interested in buying the novel ''The Life of Pi'' is also shown ''The Kite Runner'' because other Amazon customers -- presumably with similar tastes -- also purchased that book. That's just one approach among many in the science of recommendation software". Full Story @Like This? You'll Hate That. (Not All Web Recommendations Are Welcome.) - New York Times