This feature is really quite easy. Just set up any number of cameras, then have OneRender generate a path based on the camera locations / orientations. Consider for example, this quick and dirty animation took only 4 minutes to render:
During the beta period, you need to request a video render. After OneRender reaches its first full on numeric release, you will be able to do it all within the general user interface.
This isn't new to OneRender, but they cleaned up a few issues and also added some new layer types. The power of multipass rendering isn't always apparent if you haven't used it before. By separating out portions of renders into layers, it makes post-production - corrections, effects, improvements - so much easier.