With apps, we can remove them from an iDevice but with songs we can't. This feature really needs to become an option in iOS 5. If not, iCloud is just a 1 way street to filling up our iDevices with music. I love how we can now remove an app and reinstall it without ever going to a computer...songs need to be the same way. Another thing I'd like to be able to do is "preview" a song when editing a playlist on my iDevices. When you edit a playlist, you get the entire library without a means to check the song to be sure it goes in the "running" playlist.