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Earlier this week we posted a Guide to Recommender Systems, as part of our series on recommendation technologies. In this post we look at some of the challenges in building

A new study by Canadian research firm Pollara has surfaced data indicating that Malcolm Gladwell's popular theory about key influencers moving markets may not be valid. Gladwell's arguments in the

Over two years ago, Netflix announced a Recommendation Engine contest - anyone who invents an algorithm that does 10% better than their current recommendation system will win $1 Million dollars.

Mefeedia was one of the online video aggregators that Josh Catone reviewed in his Guide to Video Aggregation Sites. It claims to aggregates video blogs and web shows from over

Back in the days when you used to have to walk into a video store to rent a VHS tape, I would go through the same thing every week. After

Bookworms around the world have something to rejoice about today. The Borders bookstore, a competitor of Barnes and Nobles, has launched an online version of their storefront. You may recall

AdaptiveBlue, creators of the contextual social network Glue, announced today the immediate availability of an updated version of their semantic browser extension that adds several powerful new features. The updated

Community news site Reddit is integrating its software into Slate.com, the venerable Webzine currently owned by Washington Post. The goal is to give Slate readers "a new way to find

Given how much user activity goes on every day on Facebook, the company has to be working on some kinds of recommendation technologies. Charming invisible robots that say, "If you

Gainesville, Florida-based Grooveshark, a music sharing startup that we first profiled in August today launched their latest product: Grooveshark Lite. Lite is a slick, flash-based streaming music service that takes