MediaReview

The Long Tail: Filters 101: "
The Two Families of Filters:

* Software (recommendations)
o Wisdom of crowds (algorithms that measure collective opinion or behavior)
Buzz: Google PageRank, del.icio.us, Technorati
Ratings (active*): Netflix recommendations, eBay ratings
Behavior (passive**): Amazon recommendations, Audioscrobbler, Yahoo Music custom radio stations
o AI: Semantic analysis, audio analysis

* People (tastemakers, influentials)
o Pros (editors): Critics, celebrities, Rhapsody category editors, librarians, SavageBeast (Pandora) musicologists ( )
o Amateurs (mavens): Blogs, playlists, customer reviews, Wikipedia contributors, smart friends ( )
o Mobs (distributed intelligence): taggers, linkers, file-traders ( ) "