Until 12/31 you can get a 100% bonus when you buy, gift, or transfer USAirways miles.
You can’t buy, share, or gift miles unless your USAirways Dividend Miles account is 10 days old.
Officially you can get up to 50,000 bonus miles from each of these activities, although there are anecdotal reports that you may get the bonus past this point.
You can buy or gift 50,000 miles for $1,373 with all taxes and get a total of 100,000 miles with the bonus (1.37 cents per mile purchased)
You can transfer 50,000 miles for $567 with all taxes and the recipient will get 100,000 miles with the bonus (1.13 cents per mile “purchased”)
USAirways may not be the best airline, but they have a couple dozen great partners as part of the Star Alliance.
Their Star Alliance chart is actually quite good! For example a ticket from the US48 to Hawaii is now 40,000 miles in coach or 80,000 miles in first when using Continental or United miles. When you use USAirways miles that same flight is only 35,000 miles in coach or 70,000 miles in first regardless of whether you fly on USAirways, Continental, or United.
You can also transfer miles from Starwood to USAirways at a 20,000:25,000 ratio.