The IFrame Canvas Sample demonstrates how to set up a canvas application on Facebook in an HTML IFrame. The application is a simple page which asks you to select your favorite color, and then shares that information in your feed. The sample includes both code to build the application and complete instructions to register and set it up on Facebook. Using this sample, you'll learn about several features of the Facebook Developer Toolkit, including interacting with the Facebook API, publishing stories to a user's feed using feed forms, and rendering page content with XFBML.