Earlier in January Amazon announced their developer portal which alerted the launch of Amazon app store will no longer. According an article from Wired, Amazon app store may be live on coming Tuesday.
Not like the Android app store, Amazon app store will be curated where only the reviewed apps go live in the store. You can download the apps from either the Amazon website or a native Amazon app on Android device.
Angry Birds also engaging a deal that their most expected Angry Birds Rio will be available in the Amazon app store exclusively on launch.