FIRST
Z = Award ticket
A = Upgrade award using miles or VIP03
X = Domestic upgrade using "stickers" (100/72/24 hour window)
X = International upgrade using 2004 VPs (starting end of april)
F = AAnytime Award

BUSINESS
U = Award ticket
C = Upgrade award using miles or VIP03
R = (I think) Domestic upgrade using "stickers" (100/72/24 hour window)
R = International upgrade using 2004 VPs (starting end of april)
J = AAnytime Award

COACH
T = Award ticket
Y = AAnytime Award