I suspect we'll be hearing a lot more about emotion mapping. This project looks great and a you download the book.
Via information aesthetics:
The (44MB freely downloadable) book Emotional Cartography - Technologies of the Self [emotionalcartography.net] is a collection of essays from artists, designers, psycho-geographers, cultural researchers, futurologists and neuroscientists, brought together by Christian Nold, to explore the political, social and cultural implications of visualizing intimate biometric data and emotional experiences using technology. The theme of this collection of essays is to investigate the apparent desire for technologies to map emotion, using a variety of different approaches.
Probably the best known emotion maps are the ones resulting Bio Mapping project, a community mapping project in which the Galvanic Skin Response (GSR), a simple indicator of the emotional arousal, is recorded in conjunction with one's geographical location. By combining the emotional responses of over 1,500 people over a period of 4 years, several "Emotion Maps" were generated of the city in which the participants roamed around.