Rather than a trip, sign up for Dividend Miles Dining - get a drink or pizza at one of the participating restaurants, a few miles show up in a few days.

Buying tunes is also reported to work. Haven't tried tunes, but use the Dining option with good results.

http://usairways.rewardsnetwork.com/

there's also a shopping mail, w/ some difficulties reported at getting miles credited. The dining option is probably the quickest, surest and cheapest way to keep things alive.