XPhase Pro S (reviewed here) is back in stock.
XPhase is the highest resolution 360 camera with 200mp capture resolution (134mp stitched). It is surprisingly affordable at $879, less than half of the cost of the Panono, the next highest resolution 360 camera (108mp capture resolution, 134mp stitched resolution). XPhase also has the unique capability of taking HDR photos without ghosting.
XPhase had been sold out for a while, but is now back in stock and ready to ship on November 20. It also received recent firmware updates that enabled 6-shot HDR in auto mode, and Raw DNG support.