Programming Windows Phone 7 is a preview about a book-to-come, which may interest developers who may be wanting to program apps for the Windows Phone 7 Series.
UPDATE 29th Oct 2010: The e-book has now been released and you can download its PDF copy here.
A draft preview of this book by MVP Charles Petzold is now available for download. This download consists of 6 chapter, divided in 3 parts, and will give you an idea of what to expect!
The following six chapters have been categorized under 3 parts viz Getting Started, Silverlight & XNA:
Chapter 1: Phone Hardware + Your Software
Chapter 2: Hello, Windows Phone
Chapter 3: Code and XAML
Chapter 4: Presentation and Layout
Chapter 5: Principles of Movement
Chapter 6: Textures and Sprites
UPDATE 4th Aug 2010: More chapters are available here.
Our tutorials series for building & deploying applications Windows Phone 7 applications may also interest you!