The Tavani Bibliography of Computing, Ethics, and Social Responsibility
The Tavani Bibliography of Computing, Ethics, and Social Responsibility contains a wealth of resources which deal with computer ethics.
ComputingCases.org
ComputingCases.org contains case materials on Therac 25, the Machado case, and the Hughes Aircraft case, and many other useful links about Ethics in Computing. The website also includes background information about socio-technical systems, ideas about teaching with cases, and example exercises.