Despite Apple taking them to court over the whole "App Store" naming, Amazon has now gone live with their long awaited Android app store. As expected, along for the ride is the release of Angry Birds Rio and as of right now you can get your copy for free as part of the free app of the day promo. After that time is up, you'll be looking at a charge of $.99 for Rio.
As far as launches goes, how Amazon will make out remains to be seen but they are launching with around 3,800 apps in their catalog and a whole new system for buying -- and trying apps out. Test Drive as Amazon calls it enables some apps to be tested right from within your browser and offering full screen previews of what it is you may be potentially purchasing. Other then that, the layout of the Amazon Android app store is pretty easy to navigate and filter down to finer details if and when needed. [Amazon app store]