Amazon Cloud Player Gets Unofficial iOS Support Through MobileSafari
However, hope is not lost for iOS users looking to stream their music from Amazon's cloud solution. Amazon has updated the web version of Cloud Player to support Mobile Safari. This support appears to be unofficial - when trying to launch the Cloud Player from an iOS device, a warning prompts that it is not supported on the user's browser. However, the service loads properly, and allows for browsing of music, and it will play back without issue through Safari on iOS devices. As well, the Cloud Player supports iOS' multitasking controls directly, so it is possible to play and pause while using other apps. Track skipping however appears to not be working, after testing on both an iPod touch 4G and iPad 1G, so there are still some restrictions with the player and multitasking, although tracks do auto-advance while in the browser.
While the native app experience for the Amazon Cloud Player is superior, especially on Android, this does at least present something of a solution for iOS users looking to use the service, if/until Amazon is able to get an app on the App Store for users to use. It is unlikely that it ever will show up, but considering that apps like Rdio exist, it could happen someday, and this might just be a start in that direction.
Source: Engadget