CORS defines how browsers and servers communicate when accessing sources across origins using HTTP headers to allow both the browser and the server to know enough about each other to determine if the request or response should succeed or fail.
- do you use CORS on your Web site? (shoot the URI and why you are using it)
- If you can't use it (when you need it), tell us why
Update 23 novembere 2011: CORS is coming.