I just got my invite for Google Music Beta and so far it is working nicely when it comes to the web app on my computer. I still have my music stored on my Droid X, so that is all my Music player is showing. None of my cloud music is showing up on my phone and i made sure the setting allow it to. I downloaded the music beta app before I got the invite so maybe this could be the issue. I uninstalled it and redownloaded it and am still having the same issues. Anyone else have this problem and know how to fix it?