Kirk Evans is a Microsoft Architect for the Azure Center of Excellence.
Introduction to SharePoint and Azure IaaS
Building SharePoint Apps with Windows Azure Platform as a Service
SharePoint Solutions and Architectures on Windows Azure Infrastructure Services
Understanding Authentication and Permissions with Apps for SharePoint and Office
Sahil Malik has a great article on CodeGuru about the Ins And Outs of Routed Events and Dependency Properties in WPF. To "get" WPF, you really have to take the time to learn both of these concepts.
Adam Nathan's excellent WPF Unleashed (which should be required reading for anyone working with WPF) does a good job explaining this concept as well, but I think Sahil nails it more cleanly than any other article or book that I have read before.
Thanks Kirk :). Glad you like it.
.. an absolute MUST in understanding WPF! I am happy to see that my latest codeguru article is now online