With your music floating about in the ether, you can now organize it and listen to it. Just return to Amazon MP3, click Launch Player, and there are your uploaded tracks. One good way to organize your music is to create playlists. To do that, click the Create New Playlist link, and you'll be prompted to name your playlist. Once you've done that and clicked Save, select those tracks that you want to add to the playlist. An easy way to add an album or artist to a playlist is to select Albums or Artists from the Cloud Drive music area, and then click the downward-pointing triangle that appears when you select an album or artist entry. From this menu choose Add to Playlist, choose the playlist you'd like to add the tracks to, and click Save. Alternatively, you can select tracks and click the Add to Playlist button near the top of the track list; you then choose the playlist to which you want to save tracks.

To play your music from within your browser, select some music--open a playlist for example--and click the Play All button. Or, as with previews within the iTunes Store, just click the Play icon that appears next to tracks when you hover your cursor over them. The Cloud Player streams tracks to your computer at their native bit rate. So, if you upload a 256kbps MP3 file, that's the quality of stream you'll receive.

The Cloud Player doesn't support the playback of these tracks on an iOS device. This is not a technical issue, however. Rather, Amazon is looking for browsers identified as Mobile Safari. When it receives a request from just such a browser, you see a message that your browser is not supported. This is not a limitation of the iOS device, but rather Amazon's unwillingness to stream this content to iPhones, iPod touches, and iPads.

The proof is in an alternative browser. Download a copy of another iOS browser-- or . Each of these browsers allows you to change the transmitted identity of your browser. If, for example, you choose to identify the browser as Safari Desktop, you can access the contents of your Cloud Drive. Once you do, simply tap a track and then tap the triangle menu icon. From the menu that appears, select Download. A QuickTime window will appear, and your track will play. Regrettably, there doesn't seem to be a way to play a series of songs with one command. Rather, you must play each song using this tap-and-download method.