Music Beta by Google, as the service is currently called, is, as you can guess, in the beta phase. Users will have to request an invitation to get the chance to use it. Like Amazon's Cloud Drive player, Music Beta will allow users to upload their songs to the cloud, then organize and play them on any computer or Android device. It's been reported that Goolge has been working a music service for its Android platform to compete with Apple's iTunes.
Also like Amazon, Google is launching Music Beta without any deals in place with major music companies, due to a failure to reach an agreement through months of negotiations.
To request an invitation to Music Beta by Google, head over to music.google.com.