winnowtag.org
winnowTag - smart tags find info on your topics in real timeInnovative web feed reader uses smart tags that learn and find the content you want to see, from more sources than you can follow with traditional feed readers. Subscribe, create, and share tags. Add feeds, import feed lists, publish tags as feeds. Free. Content recommendation by open source Winnow, a high performance Bayesian filtering classifier.
http://www.winnowtag.org/