Note: This app is not officially associated with Google, Amazon, or Pandora in any way!
Cloud Music makes it easy for you to use the cloud-based music player of your choice. It currently has extended integration with Music Beta by Google, Amazon Cloud Player, and Pandora (including automatic configuration, enhanced UI, keyboard shortcuts). It also gives you the ability to specify a custom URL for another player.
No matter how you use the cloud to store and listen to music, this app can help make the experience more natural and intuitive.