This report draws on the results of a survey and case studies of Digital Library Federation (DLF) members (Council on Library and Information Resources - CLIR). The survey was intended to document how DLF member libraries are focusing their digital library programs: how and under what circumstances their programs were initiated; the influences that shaped their development; the programs current organization and funding; and the challenges they anticipate. The study began with a survey questionnaire circulated to the academic libraries that were members of the DLF in January 2001; 21 institutions responded. Extensive interviews were conducted with key staff members at six DLF member libraries: the California Digital Library (CDL), Harvard University, Indiana University, New York University (NYU), the University of Michigan, and the University of Virginia. The report is divided into two main sections. Contents of the first section include: Introduction; Aspiration and the "Skunk Works": The Young Digital Library (origins, funding, and characteristics); Rolling Projects into Programs: The Maturing Digital Library (characteristics, technical and organizational integration, and marketing and promotion); and From Integration to Interdependency: The Adult Digital Library (digital libraries as infrastructure, move toward permanent funding, continued experimentation, deep interdependency, and competition within the university). Case studies of the six universities are reproduced in the second section. Appendixes include: survey respondents and principal preliminary results from the survey data. (Contains 19 references.) (AEF)