Add playback hotkeys to Amazon Cloud Player with a Chrome extension
Google Chrome users, for example, can add playback hotkeys with an extension called keyMazony. Once installed, you'll have keyboard control of your Amazon Cloud Player queue. keyMazony commands will work as long as you're in the same Chrome window as Cloud Player, even if its tab doesn't have focus. The key combinations are customizable as well -- just make sure you don't set up a combo that conflicts with another extension or Chrome's built-in keyboard shortcuts.