This document summarizes the NIFLAR project, which aims to enrich foreign language education through blended learning using video conferencing and 3D virtual worlds. The project's objectives are to promote networked interactions and study their added value. It involves foreign language learners, teachers, and pre-service teachers. The document outlines the educational potential of these technologies and describes the design of 3D virtual learning environments in Second Life and OpenSim for intercultural competence training and assessment. Pilot experiences have involved academic students, secondary students, and student teachers. Data is being collected from interactions, tests, and surveys to evaluate the approach.