Is Google Advertising Evil?
http://www.uigarden.net/english/is-google-advertising-evil

Rhodes, John S.
uiGarden
2006

Abstract:

Google's necessary focus on advertising can teach us a lot about playing the usability game. Specifically, this article will characterize a dilemma that is tied to Google's advice to publishers on how to place advertisements. The dilemma is resolved through usability, which in turn will teach us a lot about how to mix business and the user experience.