Disney Cruise Line now has 4 amazing ships. Here is a brief overview.

The Disney Magic and its sister ship the Disney Wonder were the first two ships Disney created in 1998 and 1999. They offer a full screen theater, formal theater, family night club, an entire deck for kids supervised activities, 3 pools (kids, family, and adult only), and much more.
For the remainder of 2011 and 2012 the Disney Magic will be sailing the Caribbean for 6 to 8 night cruises and the Disney Wonder will be in the Mexican Riviera (and kids sail free in 2011).

The Disney Dream – Disney introduced this ship in 2011. It has all the amazing features of the Magic and Wonder with the addition of a water coaster at sea. This ship is much bigger than the other ships as well. This ship will be sailing the Caribbean for 3-5 night cruises that stop at Nassau and Disney’s private island Castaway Cay.
The Disney Fantasy – The newest ship in the fleet will have its maiden voyage in March of 2012. This ship is the same size as the Dream but will have added features of a Bibbidi Bobbidi Boutique and Pirates League. In 2012 this ship will sail the Eastern and Western Caribbean for 7 night cruises. This ship is already available for booking and is filling up fast.

You can also view Disney Cruise Line Deck Plans to see all the amazing entertainment, restaurants, and activities aboard Disney Cruise Line. Here are some tips if you are thinking about booking a Disney cruise.