Muon accelerator technology offers a unique and very promising avenue to a facility capable of producing high intensity muon beams for neutrino factory and multi-TeV lepton collider applications.  The goal of the US Muon Accelerator Program is to provide an assessment, within the next 6 years, of the physics potential and technical feasibility of such a facility.  This talk will describe the physics opportunities that are envisioned, along with

the R&D efforts that are being undertaken to address key accelerator physics and technology Questions.