beta620: Experimental Projects from The New York Times. "The Recommendation Engine allows us to leverage the power of distributed computing to reference each user's personal browsing history, then leverage connection via our semantic tags...."
Deep Dive offers the ability to dig deeper on a requested piece of content and bring connected items together.
By Lev Grossman, Time Magazine, May 27 2010. This article provides an overview of recommendation engines and how they work, looking at sites like Netflix, Amazon, and YouTube, but really concentrating on Pandora/Music Genome Project.