LastFM

http://www.last.fm

1. LastFm is a radio and music site that analyzes the songs that you listen to on your computer and from the information in receives and the inputs that you provide it begins to make suggestions about music you may like. In effect it learns from experience.

2. Who uses LastFM
Music Fans

3. Advantages

• The more you use the system the better the suggestions it gives to you
• Can link to others whose tastes are similar to yours and find new music through them
• Can broadcast your own music and tastes to the rest of the community

4. Disadvantages

• May result in narrowcasting

Added thoughts

Essentially this could be ported onto any other system: by analyzing the references you create it could recommend other articles or authors... or even point you to other people who might be working on similar ideas