There have been a number of attempts to describe plasma transport in Jupiter's magnetosphere in terms of interchange motions. Most of these have treated the magnetospheric plasma as a magnetohydrodynamic fluid but are unfortunately hard to reconcile with observational evidence. We therefore argue that a description of interchange of Jovian magnetospheric plasma which is compatible with observational evidence may have to take into account particle behavior that is not described in MHD models, such as drift motion. To this end we develop a linear stability analysis along the lines of earlier drift wave work. In contrast to that earlier work, which concentrates on stationary waves (implicitly an MHD-like model), we consider traveling waves and show that an interchange instability can arise, driven by that fraction of the drifting particle population which is in resonance with the wave. An interesting consequence is the possibility that a plasma which is stable to MHD interchange motions may nevertheless be unstable to the traveling wave interchange motions. We suggest that a model based on traveling wave interchange motions may help us to understand plasma transport in the Jovian magnetosphere, and we sketch out such a model. ¿ American Geophysical Union 1992