Hi Rejane! The Disney Dining Plan brochure, which you can view by clicking
here, contains a list of participating restaurants. Crystal Palace, Coral Reef, The California Grill, and 'Ohana are all listed in the 2012 brochure as restaurants where your can use your Dining Plan credits. At this time, Planet Hollywood is not listed at a participating restaurant; however, because it and many of the other restaurants in Downtown Disney are not owned by Disney, they must elect each year whether to participate in the Dining Plan. Those decisions are often not made until late December so the 2012 brochure will likely be updated in early January with more restaurants than those currently listed. Planet Hollywood has participated in the Dining Plan this year, so there's a good chance it will participate again in 2012, but we won't know for certain until the end of this year.
With the Fantasmic Meal Package, you can dine at Hollywood & Vine, Mama Melrose's or the Hollywood Brown Derby and receive a voucher for seating at Fantasmic. Those three restaurants are participating in the Disney Dining Plan in 2012: meals at Hollywood & Vine and Mama Melrose's cost one table-service credit, while a meal at the Brown Derby costs two. Guests who reserve the Fantasmic Meal Package may currently use their credits to pay for their meals at these three restaurants, and we assume that this practice will continue in 2012.
Come visit us again at the Moms Panel if you have more questions! We'd love to help!