Jamais Cascio is a futurist writer who ponders the delicacies of nanotechnology, environmentalism, transhumanism and ethics. I recently heard some of his guest spots on the RU Sirius show and was very impressed. The guy knows some cool stuff and has been a part of several interesting organizations, including the Center for Responsible Nanotechnology and the Institute for Ethics and Emerging Technologies. Below are links to a few of his appearances on the RU Sirius Show.