The number of pleasure craft over 75 feet long has doubled over the last decade. Some 2,500 of these monsters are afloat. Larry Ellison has one 453 feet long, while Paul Allen's is only 414 feet - but at least his has a recording studio, a submarine and some helicopters. Larry Ellison once purchased a fighter jet for his teenaged son, so one can assume that his own yacht is scarcely less deficient in the aviation department. And these guys often like to be on their behemoths of buoyancy alone. They cost a couple hundred million to buy, and 20 to 30 million a year to man and maintain. Who says size doesn't matter?

"World's fleet of private mega yachts growing" from MSNBC