Our mashup Mobile Facebook ID card has been updated. It lets you create mobile identification card with your Facebook ID. This mashup lets you create mobile web page with QR code that presents your name and photo from Facebook. You can present (show) this QR code (mobile page) on the some check-in point, QR code could be scanned right from your phone and your ID could be checked. You can see screenshots for the process here: how to confirm your identity with Facebook.