This presentation will provide an overview of different types of shared virtual environments and how people interact in them. This includes immersive (Cave-type) and PC-based environments, small and large groups, and collaborative instrumental tasks as well as socializing. Various aspects of interaction - navigation, communication, avatar appearance, and comparisons with real world interaction - will be highlighted and results from a number of studies of these topics summarized. The argument is made that we can anticipate what the future of 'being there together' will look like, both technically and socially. The implication is that we can use this forecasting to improve the social and technological shaping of shared virtual environments.