Think you'll be heading to the Android Market to get your next fix of Rovio Mobile's insanely popular Angry Birds? Think again. The next installment in the aviary vengeance saga, Angry Birds Rio, will launch exclusively on Amazon's upcoming Appstore for Android. That does sound like it will eventually achieve universal distribution via the Market, but in the interim Amazon has scored a pretty big scoop in its efforts to attract users to its own app repository. We're also promised the Appstore is launching "very soon" and Amazon has just inaugurated an @amazonappstore
