iPhone 5 will have metal unibody design similar to Apple’s notebooks. The site notes that the new design will mean a lower-profile device that’s thinner and lighter than previous models.
The images also show a new smaller dock connector, while the headphone jack has been moved to the bottom corner of the device (similar to the iPod Touch), and there’s a mysterious new gap between the camera and the LED flash. The site speculates this may be where a second microphone is placed. The images appear to suggest iPhone 5’s height and depth will be bigger than iPhone 4’s.