The Kindle Fire itself may still be a week away from release, but users of other Android tablets and phones can now get a small taste of what's in store courtesy of version 2.0 of the Amazon Appstore. That update began rolling out late last night and, as you can see above, it brings with it a refreshed UI that moves the app more in line with the Kindle Fire's steely gray interface. The update also adds support for in-app purchases and parental controls, as well as a number of other tweaks and performance improvements. Still no sign of those big-name apps that are promised for the Kindle Fire, though.