Now Iceland is newly one of Europe's poorest countries. As one newspaper put it, Iceland is now "banging on the doors of Russia." A year ago, the American dollar bought only 60 krona. Today, it buys nearly twice as much, or 111. Costs have been halved. Now, after years of staying away because of scalding Scandinavian prices, Americans can tour Iceland for prices that are more in line with many of our own cities.

British tourists, who are just a couple of hours from the North Atlantic nation, are pouncing on the deals, which are already cost a third less than they did before the crash. Icelandair, which takes five or six hours to reach its country from several American cities (Orlando, Minneapolis, Boston, New York), is selling round-trip flights to Reykjavik, its clubby capital, for just $400 all winter, and another $150 buys a Hilton hotel stay for three nights while you're there (the booking deadline is Oct. 21, but I'd expect more deals to come).

Fast food restaurants and grocery stores test-market products all the time by slipping them onto the shelves. So often, in fact, that average consumers may not even notice when they've tried something impermanent. But hotel rooms are a different beast. Renovations are expensive, so they can't just remodel rooms and cross their fingers. And sometimes, ideas that looked good on the drawing board turn out to be hitchy in practice.

Most of the big brands conduct most of their experiments behind closed doors. According to an illuminating exposé from Portfolio.com, Starwood (Westin and W Hotels), Hyatt's Summerfield Suites, and Marriott all run mini-properties stashed in private locations such as warehouses and office basements. Loyal customers are quietly invited to give new rooms a whirl, although they're not usually allowed to stay overnight.

But Hilton operates a wing of an otherwise anonymous Los Angeles-area hotel specifically for the purpose of trying out new room ideas. Regular guests check in and out of the test rooms, conveniently located near Hilton's corporate offices. To ensure that only brand devotees are exposed to potentially disastrous experiments, its El Segundo Hilton Garden Inn property (which is the only one of the 260 HGI properties that Hilton directly owns and operates) assigns the prototype rooms only to people with Diamond frequent-stay status. That translates to folks who stay in Hiltons for about two months a year.