This video tutorial will teach you on all the functions of your touchpad on your iPhone 3G, like the use of the tap, touch, pinch and type. How to wake up the iPhone, how to lock and unlock, how to make a phone call and open a keypad. It will also tutor you on the many ways that you can view a picture. Whether how to make it smaller, make it bigger, zoom in, zoom out, and move a photo.
Source:
http://www.youtube.com/watch?v=ZkxGFsHzIG4&feature=mfu_in_order&list=UL