SEI = Societal and Ethical Issues in Nanotechnology   The Cornell NanoScale Facility and the National Nanotechnology Infrastructure Network (NNIN) seek the integration and development of a social and ethical consciousness throughout the breadth of network activities while becoming the nation's leading open-access research facility for the study of science.   Our Mission Science and engineering are major social forces, and the role and the impact of science and engineering are immense. With its vast user community conducting research in areas that will have large impacts on society, NNIN has a vital role to play in the learning, understanding, development of a societal and ethical consciousness of the implications of the research and development. As an open network, a major technical resource with a large community of researchers, and an instrument for seeding national-scale change, NNIN provides many opportunities for research related to SEI, including learning from debates within the community regarding the ethical implications of the research and development. With its educational efforts, NNIN also seeks the development of an international outlook in the development of tomorrow's leaders through its student user community. SEI efforts within NNIN therefore embody both the network's research and educational pursuits. NNIN has organized its efforts to take advantage of the network's unique strengths as a national resource with geographic diversity and technical breadth. NNIN SEI PORTAL, http://sei.nnin.org/