Interest Graphs

I love the idea of using graphs to understand connectivity.  We experimented with it many times using enterprise data.  Walter Riker sends along a link from GigaOM on using interest graphs to create a personalized Web.  Based on an interview with the Gravity site.   Exploring:  " ...  Gravity Personalization delivers serendipity to your users. Each person has a unique and diverse experience that balances their interests, common interests of all users and the sound judgment of your editors.... "