This fourth edition of the New Media Consortium's (NMC) annual "Horizon Report" describes the continuing work of the Horizon Project, a research-oriented effort that seeks to identify and describe emerging technologies likely to have a large impact on teaching, learning, or creative expression within higher education. Drawing on ongoing discussions among knowledgeable individuals in business, industry, and education, as well as published resources, current research and practice, and the expertise of the NMC community, the report highlights six technologies that research suggests will become important to higher education over the next one to five years: (1) User-Created Content; (2) Social Networking; (3) Mobile Phones; (4) Virtual Worlds; (5) New Scholarship and Emerging Forms of Publication; and (6) Massively Multiplayer Educational Gaming. Embedded in the description of each technology is a discussion of its relevance for teaching, learning, and creative expression. Links to example applications are provided in each section, as well as a list of additional readings. [The 2007 Horizon Report is a collaboration between the New Media Consortium (NMC) and the EDUCAUSE Learning Initiative, an EDUCAUSE program. For the 2006 edition, see ED505096.]