Found the info about this on MousePlanet today:
Disney Visa Rewards Card members can receive a free copy of the film's soundtrack when they see the film between March 30 - April 3. You must be a cardholder and visit www.disneyrewards.com/mtr after they see the film (and by April 3rd). Answer a few questions about the movie and they will send you the soundtrack by mail. Limited quantities.