There’s good news for those tired of waiting for global warming to turn the country into an equatorial archipelago. Endless summers on private island paradises are no longer only for the shipwrecked or reclusive. “Isolation has ceased to be a form of deprivation,” says Cheyenne Morrison of Coldwell Banker Morrison’s Private Islands. “In the modern world of mass travel, mobile phones, faxes and e-mail, isolation is the scarcest commodity.” But it’ll cost you. Vatu Vara, the most expensive island on this year’s list, has an asking price of $75 million, and comes with miles of white-sand beaches, palm groves, an aquamarine lagoon, limestone cliffs and surrounding waters filled with sailfish and black marlin. To the extent neighbors exist on an island chain, Mel Gibson lives just down the way, 20 miles east on Mago Island.