The Notepad app seems to have been updated with a simple blue-lined schoolpaper design, and is complemented by a new style home button.
Obviously, wi-fi reception is of great importance, although some may say the new aluminium back feels a little cheaper than the current unibody design.
Looks like the logo has been refreshed, as well. It's challenging designs like these which keep Apple at the forefront of consumer electronics. Let's hope the engineer who lost it doesn't fare too badly!