Just got this in my email from my friend Amazon.
Dear Amazon.com Customer,
With Kindle Fire, you can enjoy your music wherever you are. Start adding music to your Cloud Drive now so you can play or download it on your Kindle Fire when it arrives. You can add music by saving your Amazon MP3 purchases to Cloud Drive, plus you can upload even more music from your computer by visiting www.amazon.com/cloudplayer. Right now, get unlimited storage for music + 20 GB of Cloud Drive storage for only $20/year. Once your music is saved in Cloud Drive, you can play or download it on your Kindle Fire, Android device, PC, or Mac with Cloud Player.