iCloud (here’s more on the iCloud.com launch), which allows iTunes purchases including songs and TV episodes to be stored on Apple’s servers and tapped into on-demand via any of your iTunes or iOS devices. This includes the option to have your purchases automatically download to each of your devices (buying a song via iTunes on your computer and having it immediately also download itself to your iPhone, for instance) and also includes the ability to download any previous purchases, including those you may have lost due to drive failure, for free
