This looks like the best use of a Nintendo DS until Final Fantasy Tactics DS comes out. As Susan Arendt wrote on Wired’s Game Life:
Disney is currently field-testing the use of DS Lites as an interactive tour guide and map for its Magic Kingdom resorts. Most brilliant idea ever? Quite possibly.

Having just come from Disney World, I know how helpful it would have been at the park. A small screen to tell you how to get from Laugh Floor to PotC as quick as possible or where to buy a Rice Krispy treat would have been awesome.

Use Your DS As An Interactive DisneyWorld Tour Guide | Game | Life from Wired.com