If you haven’t already joined US Airways’ Dividend Miles program, take advantage of a new 1,000 bonus mile offer for signing up. Simply join by December 31 using promo code NMCB.
You can also earn 2,000 additional miles if you sign-up using the promo code above and book a US Airways flight within 60 days using a Mastercard.
(Tip of the hat to Gary)
I used the code above (NMCB), but my balance shows as 0 miles.
This offer was back in 2010, so I cannot imagine it is still valid.