This just in: the new iPod Touch with front-facing camera (aka the iPhone Lite) has a built-in vibrating motor for notifications, including silent call notifications. Why is this important? Well, presumably the iPod Touch is now a Facetime phone and definitely needs new ways to interact with the user. I’m personally very excited.
This confirms information found in the Accessibility page for the iPod.
Here is the first piece of evidence, and it is on Apple’s very own website. Located on the Accessibility page for the iPod touch, you can scroll down to the ‘Video calling with FaceTime‘ and clearly see the following: “… If somebody wants to start a video call with you, you’ll receive an invitation — along with a vibrating alert — on your iPod touch asking you to join. …”