Amazon pushed an update to its Appstore today that brings a few new features, as well as a much sleeker interface. The theme is much easier on the eyes now, as the formerly-white app is now wearing a suit of gray with hints of orange, which matches the color scheme of the upcoming Kindle Fire perfectly.
Aside from the change in appearance, the Appstore also has support for in-app purchases and parental controls now, as well as a page where you can check permissions before you purchase an app. Download and load times have also been improved, so you'll spend less time waiting and more time... doing whatever else.
If you don't have the Amazon Appstore installed, you can find out more info and download it right here.