Amazon Cloud Player Doesn’t Work On iOS — But It’s Not A Flash Issue
On Android devices, Cloud Player works by way of the Amazon MP3 app. This app does not exist on the iOS platform because it would compete with Apple’s iTunes Store. Presumably, Amazon could make another stand-alone app for Cloud Player or include it in one of their other Amazon iOS apps, but Apple new platform rules on subscriptions make this a bit murky (Amazon’s Cloud Drive is free for 5 GB but costs a yearly fee for more storage).
You'd think the alternative would be to simply launch an HTML based web-app at this point. @GlennF points out that Safari can support background audio with iPhone 3 software as well, though Siegler reminds us the audio player simply doesn't work. I worry that the lack of support for iOS devices at launch is a huge missed opportunity, especially when you could have directly insulted Apple by playing on their own turf. Now, the talk won't be about that Amazon launched cloud based storage and streaming, but that they aren't on the most popular media devices at launch. I'm under the presumption that Amazon wants a native app in the App Store (but can't), but then again we're talking about the same company that requires Android owners to install the Amazon Appstore in eight steps. Thankfully for the Amazon MP3 app, it only takes one.
On the upside, 5 GB (then 20 GB for a year if you simply buy an album) of free cloud storage is incredibly generous, and I suspect John Gruber might be right about the development of a tablet or phone to coexist with a new media ecosystem (see the 8-Steps link above).