The Clouds ARE Coming! Cloud computing is more than the future, it’s the present, Amazon Cloud Player has been out for a couple of months, but hasn’t made a lot of noise due to battling with Sony for the rights to stream there music, but that didn’t stop them for updating the player to work with iOS(getting ahead of Apple’s iCloud?), Hit the Jump for Details.
@TatWZA

For the Music they do have, or at least that you have in your iTunes already, it works with most of your iOS needs, not sure about the Original iPod lol, but the original iPad and iPhone 3GS and up your good money. Everything is in Sync down to the controls and quick updates. Here are some screen shots of it in action.