Music Store is the sample application included in the Web Client Guidance project. We modified it so it now has a real data access layer, uses most of Entlib 5 application blocks and ported it to Windows Azure. This sample was more of an exercise to understand any potential blockers on using EntLib 5 on Azure.

Please check the whitepaper for details on usage of EntLib 5 on Windows Azure.

Release notes:

When Azure builds your project to run in the local Dev Fabric, it uses a path under your User Profile. You might find that this path combined with the name of the project can be too long and exceed the 256 character limit for ASP.NET to load the site. You can change the directory where Azure deploys your project by setting the environment variable CSRUNSTATE_DIRECTORY. Set this to something like C:\Azure.
You can read more about this here