Top-rated hospitals like five-star hotels with services priced as much as 80 percent cheaper than you're used to? Sounds like a dream come true! The catch is, you're going to have to make sure your passport is up to date. Americans travel abroad for more than just facelifts and a safari these day, choosing hospitals in Southeast Asia and Latin America for everything from dental work to knee replacements. Have you done it, or do you know someone who has? Would you consider it?