AppHub had just created 22 scenario focused web pages for developers. It provides a comprehensive view of all the resources available for Windows Phone 7 development. I figured that this will be interesting and useful for developers like you and me.

We can see this here, http://create.msdn.com/en-us/education/basics/developer_resources

Silverlight for Windows Phone
XNA Game Studio and XNA Framework
Windows Phone Developer Tools and Device Unlock
User Experience and User Interface
Application and Execution Model
Input, Touch and Gestures
Launchers and Choosers
Security
Frame and Page Navigation
Isolated Storage
Performance
Advertising Services
Camera and Photos
Media – Audio and Video
Push Notifications and Live Tiles
App Bar and Controls
Location and Mapping
Networking and Web Services
Sensors
Globalization and Localization
Porting Your App or Game to Windows Phone 7
Application Publishing and Marketplace