Amazon today launched Cloud Player, a Web-based music server.
Instead of saving music locally on your computer's hard drive, you can save it to Amazon's hard drive.
The nice thing about ths is you can play your music from your phone and other devices without having to copy it from your computer to that device.
You can play your music on your devices by connecting to Cloud Player and do not need storage space on the device and you don't have to synch your music up on that device every tie you buy new music. You also don't have to worry about your music disappearing if your storage device gets sttolen or misplaced.