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Too bad gas prices are falling.

While the rest of the world

Soaring fuel costs can potentially save us real money on our next vacation -- if not in the short term, then down the road. The effects were already being seen across the board: hotel rooms, car rentals and counterintuitively, even airline tickets. If nothing else, paying more at the pump would have encouraged travelers to do things that will make travel more sustainable in the future.

Don't believe me? Just talk to your seatmate or fellow hotel guest.

If you do, you'll hear that contrary to travel surveys that basically shrugged off the energy crisis, travelers either plan some dramatic and permanent changes to the way they get around, or they've already made them.

Chat with Kathleen Hargan, a child custody mediator from Oakland, Calif., and she'll tell you the sad story of downsizing her car to a Prius. "I loved my Lexus almost as much as my firstborn," she says. "Well, a far second, anyway. It was a dream car. But I had an epiphany when gas hit $3 a gallon."

Some travelers have gone even further. "I've cut my gas consumption in half -- or even better -- by parking my old reliable GMC Suburban in favor of a BMW motorcycle," says Jack Riepe, who works for a trade organization in Alexandria, Va. "In most cases, a pair of khakis and a dress shirt can be teamed up with a blazer in the saddle-bags for a business look. Business associates have gotten used to the boots."

Others are trying to kick the fossil fuel habit altogether. "Gas prices pushed me to buy a bike," says Lynette Phillips, a university research associate who lives in Shaker Heights, Ohio. "We live close enough to some stores that we can walk, so I do that more often."

So how is this affecting travel? J Michael Murray, a retired professor from Sarasota, Fla., canceled his Mediterranean cruise this fall. "Flying to Istanbul and back from Rome was too big a hassle," he says. "The cruise and related expense was just too much for what we would have gotten." Remember, cruise lines have imposed

I'm hearing from a lot more people like Doreen Friel, a communications consultant from Tampa, Fla., who is frustrated by both higher energy prices and the hassle of travel. She just canceled her Delta Air Lines affinity credit card because, "Sky Miles are now worthless," adding, "it's just not worth leaving home anymore."

If fuel prices head higher, travelers like Friel will benefit. Have I fallen off my rocker? No. Here are three ways high gas prices can you money.

Hotels were holding the line on further discounts, but if bookings continue to slow, they would have no choice but to cut room rates. Average daily rates slowed from an uptick of 7.1 percent in 2006 to about 5.9 percent last year, according to PricewaterhouseCoopers. A recessionary economy might have pushed that growth into reverse, which would have been a boon to bargain-hunters.

Here's the thing about rental cars that

It doesn't take an aviation analyst to figure out what might happen if fuel prices again start heading north. Customers eventually will refuse to pay exorbitant ticket prices, and the weakest airlines will fail. But I don't envision a future in which two or three remaining carriers are able to set their own monopolistic prices. Instead, I see a future where the poorly-managed air carriers liquidate and new airlines emerge to meet demand from air travelers. These upstart carriers will be more efficient, customer-friendly and unencumbered by the poisonous corporate cultures that have defined many of today's dysfunctional airlines.

Higher fuel prices have already forced travelers to make some long-overdue changes -- whether it's cutting back on trips or being more mindful of our limited energy resources. Cheaper prices at the pump threaten to put a dent in the progress.

I'm not the only one who feels that way.

"I am enjoying the high price of oil," says James Edward Wright, a retiree from Duluth, Minn. "For too long, citizens told our political leaders to make sure we have low gas prices, even if we have to drill holes in some third-world country that hates us. We need $4 to $5 a gallon gas to make it painful enough for us to demand a fix."

Couldn't have said it better myself.