I would at least figure that there should be an app available for Amazon on the Apple TV. I mean, if iOS has it (Amazon Instant Video on my ipod, which also displays on my Viewsonic LCD or TV screen), I would be surprised if you didn’t have a channel for Amazon Instant Video for Apple TV. I have Roku, now, but I realized regretfully that I could have just added a mere 25 dollars, AppleTV would have been worth it, I guess there’s next time.
There should, but I just can’t remember just now. BUT ALSO, keep in mind that Amazon is selling their own little box for the TV ... SO ... they may want to restrict it just to their own device. I can’t say for sure, though.