However, no Chromecast support. Boo!
It does work. I've installed it on both my RAZR HD and my Nexus 7. However, you must also have the Amazon store app installed as well.
On the Nexus 7, you MUST install the non-tablet version of the Amazon store app. Until I installed the non-tablet version, it would keep telling me I had to install it and then would redirect me to the Amazon store web page.