The Web 2.0 Experience Continuum
http://www.adaptivepath.com/ideas/essays/archives/000545.php

Saffer, Dan
Adaptive Path
2005

Abstract:

There’s been a lot of talk about the technology of Web 2.0, but only a little about the impact these technologies will have on user experience. Everyone wants to tell you what Web 2.0 means, but how will it feel? What will it be like for users?