This paper discusses the role of Multi-User Virtual Environments (MUVEs) in the development of epistemic learner identity. MUVEs might help educators create the types of tasks and intellectual open spaces helping students with learner identity development in the information age. MUVEs can create new possibilities for dissemination and sharing of critical information (e.g. nonhierarchical, non-linear), opening up spaces of (safe) rebellion against top-down, teacher directed educational processes, helping students become more autonomous thinkers, ready to question information, and search for multiple sources in problem-solving. The experiment reported here follow two General Education classes for pre-service teachers (58 students) that integrated the MUVE "Second Life" as a major part of their curriculum. The experimental MUVE condition was compared to two classes (59 students) using the same curricula approach and the same instructor but without using a MUVE. Individual student blog posts (weekly assignments) were extracted for both groups (experimental, active control) from three different time points over the semester. The posts were coded for levels of complexity/uncertainty, critical perspective and source of information. It was expected that students in the experimental (MUVE integrated) group would show increases over the semester as compared to the active control group. Growth curve analyses suggests students in the experimental (MUVE-integrated) condition did indeed increase in modes of thinking that question authority through increased complexity/uncertainty and critical thinking in their assigned academic/intellectual tasks, suggesting possibilities for epistemological shifts.