birdmom, it is an extremely rare prize from the website that Disney set up to promote Pirates 2 (Dead Man's Chest).
If you go to disneypirates.com, and enter the site, there is a game to play.
If you successfully complete the game, it gives you a VMK code for a prize. The prizes include a chest, or organ, or a few other furniture items. The most rare is a code for the Jack Sparrow Costume. I have heard that it is 1:5000 chance of getting the Sparrow.
I have played it dozens upon dozens of time myself, with no Sparrow luck.
Hope that helps.