The soundtrack is now fully installed into the movie and will be available to purchase on June 29. I'm definitely going to buy it! Check out the link to view a youtube video that plays samples of the music and where in the movie it will possibly be located.
http://www.youtube.com/watch?v=YssiTktcK_I&playnext_from=TL&videos=KLQp_X4Ru9c&feature=sub