@ericrwalker, the Prime video content used to suck... but not any more! Netflix is starting to suck more, and Amazon Prime's stock is rising. Check it out. They recently got Epix, which has a LOT of recent release movies, and they have a TON of TV shows no one else has: West Wing, Fringe, etc. BTW, no one has West Wing, and it's not even available on Blu-ray, but Prime has it in HD (OK, looks remastered from DVD, but better than SD).
It's not all roses, though... the web interface sucks big time. It's as if they're TRYING to make it hard to navigate. The iOS app is awesome, though I wish you could AirPlay the video to an AppleTV.
I wish there were an AppleTV Amazon Instant Video app w/o jailbreaking. I have the latest retina MacBook Pro 2.6 GHz Core i7 but Mountain Lion's AirPlay mirroring was obviously made for desktop mirroring, NOT streaming video. iTunes AirPlays HD video flawlessly, because it's made for that (proper buffering), but so much content is in AVI (MKV is fine thanks to Subler!).
David