Traditional approaches to build cloud applications have been very successful, but as we reach the performance limits of computing, perhaps a functional approach will yield the next quantum leap in designing and building high performance distributed applications. In this talk, we will take a traditional problem - building an accounting system - and develop a radically new functional architecture suited especially for Azure. We will apply functional concepts such as value semantics, and immutability to the Azure environment and develop techniques for super-scalable, functional workflows.