Silverlight 4 introduces the ability to access a Webcam and use it to capture images or video, here is a simple tutorial
to get the feed from a Webcam to appear in a Silverlight application using Visual Basic and Visual Web Developer 2010 Express Edition.
You will need a Webcam to be able to use this example - make sure you have your Webcam connected before running the Project,
the one used in this tutorial was the Xbox LIVE Vision Camera.
www.cespage.com/silverlight/sl4tut2.html
Demo