The Nokia E72 is the first Nokia device to incorporate a full working optical trackpad. Previous Nokia, like the N78 and N85, had an optical trackpad but could only be used partially in some menus: pretty much useless. The E72 is a whole different story, the optical dpad is completely integrated. Even in the web browser, you can move the arrow around and select by using the optical trackpad. As seeing it working in video is way better than reading a description, here is the video walk through of the optical trackpad found on the Nokia E72: