  A directed R&D program is presently underway in the U.S. to evaluate the
designs and technologies required to provide muon-based high energy physics
(HEP) accelerator capabilities. Such capabilities have the potential to provide
unique physics reach for the HEP community. An overview of the status of the
designs for the neutrino factory and muon collider applications is provided.
Recent progress in the technology R&D program is summarized.
