Critical Friends of Technology files this report on three aspects of wireless (mostly cell, but some Wi-Fi): The report covers developing nations use of wireless technologies, the environmental impact of wireless (including disposable cell phone systems coming on the market), and health issues associated with wireless.
Interestingly, on the last point, health is broadly defined as both the interaction of wireless systems of all kinds and medical telemetry and other medical devices, and the direct impact of wireless on human health.
(I'm asked all the time about whether Wi-Fi poses a health threat, and I point people to an extensive lists of questions and answers at the FCC site.)