We first reported news that invites for Music Beta were being sent out to Motorola XOOM owners last week, but as of today, it’s looking like Google has opened the flood gates to almost everyone. While I’ve been using the service for a week (and love it) thanks to an exclusive invite for attending Google I/O, another of my email addresses just received an invite. Also, our very own Timotato just got his as well as a ton of our followers on Twitter. It’s looking like a good day for music fans. Check those inboxes!