Modernization of the electric grid involves the pervasive application of sensors, actuators, communications, computer-based control and management systems on and end-to-end basis, and standards for interoperability of these devices and systems are critical to the system's operation. Experience has also shown that security aspects must be 'baked in' from the start, with systematic management of risks. We will overview progress in NIST's public/private partnership effort to establish the architecture and interoperability standards for the smart grid, how cybersecurity aspects are being addressed and coordinated, the role of the Smart Grid Interoperability Panel, and opportunities for stakeholder involvement.