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Information and communication technology is transforming our notion of literacy. In the study of second language learning, there is an acute need to understand how learners collaborate in mediating discourse online. This edited volume offers essays and research studies that lead us to question the borders between speech and writing, to redefine narrative, to speculate on the consequences of many-to-many communication, and to ponder the ethics of researching online interaction. Using diverse technologies (bulletin boards, course management systems, chats, instant messaging, online gaming) and situated in different cultural environments, the studies explore intercultural notions of identity, voice, and collaboration. Although the studies come from varying theoretical perspectives, they point, as a whole, to insights to be gained from an ecological approach to studying how people make discourse online. The volume will especially benefit researchers in the digital arena and instructors who must consider how online interaction affects language learning and use.