Apple posted a video demo of iPhone’s VoiceOver function for people with disabilities. Video demonstrates how to use the function in combination with finger gestures.
VoiceOver is the world’s first gesture-based screen reader. Instead of memorizing keyboard commands or pressing tiny arrow keys, you simply touch the screen to hear a description of the item under your finger, then double-tap, drag, or flick to control iPhone. VoiceOver speaks 21 languages and works with all of the applications built into iPhone 3Gs.