I've been trying to track down an invite for quite some time now and I'd greatly appreciate it if someone here would kindly offer me an invite. Send me a PM if you're in the program, I could trade you one invite for another as a thank you. Alternatively, if you're more interested in game music I could track down a quality copy of a video game soundtrack or two for you.
UPDATE: I've acquired an invite and I'm now offering invites to other members of the forum. Feel free to post with your gamertag and I'll add you. Keep in mind that it may take 24 hours to 2 weeks for Microsoft to confirm your invite and register your console.