Say hello to Chameleon Clock - A big, bold, beautiful clock for iOS. Chameleon Clock blends into your environment by using the camera on the back of your device to either sample the colour of whatever is behind it or, play a live video feed.
WOW-Keys ($100 USD) is a full-sized QWERTY keyboard/dock combination that allows you to input text from your iPhone to your desktop computer and also enables you to use your iPhone as a trackpad. http://hypebeast.com/2011/05/wow-keys-iphone-keyboard-dock-by-omnio/
This is another example of good and smart design. The iPhone 5 Magnetic Battery Back Cover uses magnetic adsorption technology to add a battery to your iPhone 5. Becomes a back cover for your iPhone 5, too. Also can be used as an emergency battery for your iPad 4 / iPad Mini / iPod Touch 5th / iPod Nano 7th. This accessory is compatible with: - iPhone 5 $50