Apple released the 4th generation of the iPod Nano. The device is only 90.7mm-38.7 mm-6.2 mm and weighs 36.8 grams. Pricing is $149 for 8GB and $199 for 16GB. They are available in 9 colors. The device is now available on the Apple Store.
Apple released the new iPod Nano ad: (you can also find it on Apple’s site)
Update: Apple posted an iPod Nano QuickTour video highlighting the new features of the iPod Nano.
Read more about it at Macworld