Source: http://gizmodo.com/5578456/google-music-launching-alongside-android-30-this-fallwinter
According to Android product manager Gaurav Jain, Google Music will be launched concurrently with Android 3.0 (Gingerbread) at the end of this year. Presumably just in time to battle iTunes Live.
Apple and Google's race to stream content from the cloud has never really been a question of if so much as of when, and today's report from Israeli financial paper Calcalist gives us the clearest indicator yet of when we'll actually start being able to take advantage. Nevermind that mSpot already beat Google to a cloud-based Android music service; mass penetration won't happen until the big dogs step up with their own platforms.
Jain unfortunately didn't offer up any other details about what form Google Music would take, although we've got our own hunches. We do know, though, that we're just a few months away from finding out. [Calcalist via Know Your Cell]