I have a lot of learning resources you can find here at my blog, but I wanted to point one out this morning. It's a Silverlight application called "Azure Design Patterns". You can find it at http://azuredesignpatterns.com/, and it's an interesting way of looking at concepts and patterns for Azure interactively.
I use this quite often even in presentations to show definitions of terms, and to explain concepts within Azure. You can do the same when you're asked to explain a Platform as a Service like Azure. Explore the site to create a "map" of what you want to cover. The advantage of this approach is that you can leave your listeners with not only the material you cover, but other information they might want to learn.
Of course, it's not just for presentations. You can use this information for many of the technical concepts within Azure for your own learning, but you should be aware that it is not a "book-like" experience, meaning that you should probably use this site as a great reference less than a sequential learning plan.