Dividend Miles members can earn double miles for travel
between Philadelphia and Santo Domingo through Jan. 31, 2001. Members must
register for this offer by calling 1-800-872-4738 and selecting Bonus Request
number 2273 or online at: http://www.usairways.com/dividendmiles/santodomingo/register.htm

That's because US is having a tough time yanking passengers away from AA...

AUA, on the other hand, is apparently going gangbusters.