US Airways will be codesharing with Italian airline Air One, a partner of Lufthansa, beginning sometime this fall. Starting today, US Airways Dividend Miles members are able to earn miles flying on Air One, which count towards preferred status, and to redeem miles on Air One flights. Reciprocal lounge benefits have also been announced.

http://www.usairways.com/dividendmiles/air_one.htm

US Airways already codeshares with Lufthansa, Lufthansa CityLine, and Lufthansa partners Air Dolomiti and Eurowings.

US Airways has other codeshare relationships with Star Alliance members United, bmi, and Spanair; and GoCaribbean Network members Bahamasair, Caribbean Sun, and WINAIR.