Some time ago a friend of mine recommended me a project which consisted in an iPhone application which would receive the news from a webservice. And, behind the webservice, should exist a Windows Azure app. I had very little time to learn the details of Windows Azure and, after a while, the project was released. The experience was very interesting and satisfying but, since Windows Azure was a very recent technology, there weren't so many material or bug reports where I could look at that time.
And why am I saying that?
The keynote is very interesting and have clarified many points about Windows Azure I didn't know or I have ignored. It's a good start for everyone who would like to dive into cloud computing using the Microsoft stack.