Just discovered something awesome I can't believe no one else has talked about this yet on the Thunderbolt. But, if you install the gingerbread music player (linked below) and then go into your Google account settings you'll now see an option to sync music. This syncs to Google's new cloud service and once done can be accessed even when your music is no longer on your phone.
**Edit the file extension and change from .mp3 to .apk**
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