The Windows Phone codenamed "Mango" release brings new camera APIs for developers to preview the live camera stream, capture videos, seamlessly integrate with the camera's hardware buttons.
In this episode of Inside Windows Phone, Shamik Bandyopadhyay (Program Manager for camera on the phone) and Ayman Afanah ( Program Manager for Silverlight on the phone) show you demos that demonstrate the new camera features and walk you through the APIs that you will be using to integrate camera into your apps.
Source for the demos in this video.
Mango training kit with "photofun" hands-on lab demonstrating photo features
Jaime Rodriguez's blog (for more upcoming Mango samples and insights)