A source inside Apple revealed last month that the company would begin offering email-based FaceTime calls on (camera-equipped) iPod Touches and iPads, and now there seems to be some solid proof of the claims — an option in the latest beta version of iOS 4.1 contains a new email option for FaceTime calls the device's Contacts folder.
This means that any device not associated with a phone number could make a FaceTime call over WiFi via a phone number or email address as previously reported. This, coupled with the recently "leaked" photos of an iPod Touch with a forward-facing camera, make these claims seem even more solid than before. However, I'm still curious to find out how many iPod Touch and iPhone 4 owners will use the FaceTime feature. I suppose there would be more of an option, since the pool of devices compatible with FaceTime would expand, but tell me — would you use FaceTime on an iPod Touch, or if you're an iPhone 4 owner, do you use FaceTime now?