I am happy to announce that you can find the fourth chapter of a whitepaper on how to develop applications for the Cloud using the Windows Azure platform written by me, François Merand and Laurent Gautier on the official Visual Studio homepage.
http://www.microsoft.com/france/visual-studio/scenarios/developper-pour-le-cloud.aspx
This is the last chapter of the series. We will however continue to finalize and optimize the corresponding application when we find some time. So many additional things to do : ASP.NET MVC 4, IoC, additional abstractions, the implementation of the worker role and the image processing, etc…
You can find the source code of the BDTheque application here.