Priceline’s latest US-based promotion/sweepstakes may be of interest to the Upgrade: Travel Better crowd. The “Ultimate Upgrade” offers free private jet travel, or, more likely, upgrades on American or USAirways. (The catch: If you win an upgrade, you have to buy the ticket you wish to upgrade from Priceline; presumably the name-your-own-price tickets are not eligible.)

Entry is automatic for air or air+hotel purchases. “No purchase necessary” — mail in a card. See here for the full rules.

The private jet services are offered through OneSky, which is notable for offering discounted private jet travel for repositioning flights. Let’s say someone books a plane to fly from New York to Miami, and someone else books the same plane to fly from Washington to Chicago. The aircraft has to get from Miami to Washington, but it has no one to carry. Enter OneSky, which purports to offer access to such flights at a discount to normal private jet rates. Still not cheap, to be sure, but cheaper than retail.