Media selection and acquisition is highly dependent on a number of variables, perhaps the most important of which is changing technologies. New technology is a wonderful and frightening thing, with a high level of impact on media collection development. New technologies can improve sound and visual quality, but can also play havoc with established collections and budgets. Availability of various media formats and titles is a very fluid phenomenon, which poses a unique set of challenges to media librarians and selectors. (Contains 11 online sources.)