Angry Birds developer Rovio announced on its Facebook account a few hours ago that "AT&T is also working on enabling purchases from the Amazon Appstore soon," which would mark a pretty big move on AT&T's part since they've been firm in their resolve to keep apps from outside the Android Market ecosystem off their branded Android devices -- a frustrating (and arguably illogical) stance, to say the least. Well, first the good news -- AT&T has confirmed to us that they are, in fact, setting up access to Amazon's store:
"We're working to give our Android customers access to third party application stores. This requires updates to our systems and f
