Recently Microsoft has released an update to the Azure SDK. Windows Azure is a cloud services operating system that serves as the development, run-time, and control environment for the Azure Services Platform.
A sponsored paper of David Chappell explains the Azure plattform: Azure is depicted as a bundle of .Net, Live and SQL services.
In other words Azure uses an existing software stack bottom-up and packages it for a cloud strategy. My open question is how that Azure strategy would actually translate into downstream innovation and repositioning.