Kirk Evans is a Microsoft Architect for the Azure Center of Excellence.
Introduction to SharePoint and Azure IaaS
Building SharePoint Apps with Windows Azure Platform as a Service
SharePoint Solutions and Architectures on Windows Azure Infrastructure Services
Understanding Authentication and Permissions with Apps for SharePoint and Office
Did you write your own WS-Addressing implementation? Do you want to know if your stack will interop easily with Microsoft's?
Doug Purdy points out a fantastic resource... mssoapinterop.org. Use this to find out where potential interop problems are between your stack and Microsoft's. You can review the results of previous interop runs against multiple stacks as well as use a host of tests from the Interop Plug-Fest where the WS-* specs were exercised.