The study's purpose was to investigate the views and opinions of librarians about the implementation of Web 2.0 technologies into library operations and services. The Delphi technique was chosen as the method of inquiry in this study, in which a group of panelists graded the desirability and probability of a list of statements. Thirty-nine librarians from United States and Canada participated in the study by answering the questionnaire. The study consisted of two rounds. In the first, participants were asked to grade seventeen statements and answer four open questions posted on a Web site. In the second round, participants were asked to provide an explanation for answers that fell outside of the consensus. The study investigated the panelists' views on the following issues: (a) the changing nature of libraries and of the information profession, (b) user-generated content at the library, (c) the library's role as a learning center, and (d) adoption of Web 2.0 technologies in libraries. Participants' answers also revealed issues with the marketing of library services. Findings revealed a big difference between what participants viewed as desirable and what they thought as probable for most issues. Furthermore, participants were skeptical on the ability and willingness of librarians and libraries to make the necessary changes to adapt to the new information reality brought on by Web 2.0 technologies. (Contains 17 tables.)