One million certified volunteers will get a free day of Disney fun after they do a day of service certified by the HandsOn Network, which has over 70,000 affiliated agencies from Habitat for Humanity to local food banks. Details from the Disney parks blog:
//http://disneyparks.disney.go.com/blog/2009/09/give-a-day-of-volunteer-service-in-2010-get-a-day-of%20disney-theme-park-fun---free/
Of course, there are some strings attached: You must be at least six years old or older, be a resident of the USA, Canada or Puerto Rico, the work must be completed in 2010 (natch), and you must use the admission by December 15, 2010.
EDIT: The one million volunteers have been reached, and the promotion has ended as of March 10, 2010.[/i]
BUMPED FOR THE EDIT.