Centralized identity management is dead. Passwords should be dead. The identity assumptions of the first 50 years of computing are no longer meeting the needs of the 21st Century. We need to use Open Standards and Open security models to federate identity and access control - not just across organizations but across different technologies, different standards and different models. The concept of an Identity Bus is a reference architecture for solving these problems and creating a strategically federated approach to identity, and creating approaches that support borderless identity.