Royal Caribbean is selling 3 transatlantic cruises in April 2013 with great prices as low as $719 for an inside cabin on the 14-night cruise from San Juan. What's more, they are including their deluxe beverage package as part of the deal, which I believe is normally offered only on certain ships that are sailing totally outside of the U.S.
The drink package alone is a substantial perk. You can see these cruises and the details
HERE.