Yale's Beinecke Library "welcomes applications from current graduate students in library science, information studies, preservation, archives or a related program for its newly constituted internship program. The program has been designed to provide practical experience to current graduate students interested in pursuing a career in technical services in a special collections setting."
For the summer of 2008, the library seeks four interns, one for each of the following areas: archival and manuscript processing, digital library and metadata development, preservation, and rare book cataloging/acquisitions.
More information, including application requirements, possible projects, and background, available here. Applications are due 29 February, so don't delay.