If, per chance, you have Gold level status with any Star Alliance airline (most likely as a Premier Executive with United or whatever the counterpart is with US Air), you get an extra 44 lbs in the form of a third piece of luggage. See: http://www.staralliance.com/star_alliance/star/frame/main.html
Scott
Ren R7:'01
HAL Volendam:'02&'05
RSSC Mariner:'02,’05,’09
RSSC Voyager:'03,’05,’06,’07,’08,’10
RSSC Diamond:‘04x2
RSSC Navigator:’08
Silversea Spirit:’10
12:A&K Le Boreal,Antarctic; Voyager,Iceland
13:A&K Le Boreal,Arctic
| 
