The Long Tail/Viral Marketing

Here's a site that uses the idea of the long tail:

http://www.3wk.com/

This on-line streaming radio station allows users from all geographical locations to listen to bands they might not have otherwise been exposed to prior to the space-time compression brought about by the internet. Physical location is no longer an obstacle for listeners who want to discover bands from different parts of the world who do not conform to conventional pop culture.

This site also acknowledges the importance of viral marketing; it encourages users to recommend the site to others:
http://www.3wk.com/share3wk.php