Rockstar Games currently has a partnership with Amazon.com and iTunes, and right now you can only order their music through those other stores. But it looks like they want to cut out the middle-man and start selling the music directly to the consumers themselves. (I wonder if Apple and Amazon know about this yet? Their partnerships only started a couple years ago actually.) =]
Soon, you'll be able to purchase music CDs, such as "The Music of Grand Theft Auto IV", Red Dead Redemption, and other greatest hits from most (if not all) of their games directly from Rockstar's new online music store.
Here's a link to the Trademark registration if you're interested.
And here's a photo of an "example" Music CD used in the registration:
Yeah, I know.. it's kind of boring news, but hey I'm the first to announce it. =]
I'm actually shocked that they didn't already HAVE an online music store.. I didn't even know they didn't have one until I saw the new trademark registration.