Check ou the new Windows Phone 7 development articles which are aimed at guiding you through all the fundamentals of WP7 development, starting with “Hello World”. The topics are presented in a recommended order for newbies (like chapters of an intro book); however, they are also designed to be modular, so you can skip around to learn about specific tasks and features. The content uses a lot of code snippets along with screenshots, videos, and even embedded Silverlight to demonstrate how the code behaves.
Please help us spread the word! Blog posts, links from your webpages, tweets—it’s all appreciated. They took work to make and it’d be great to attract as many eyeballs as possible.