BM9EC4-H4NE-BRE9V2-2KKF-E26G82
FNYW79-48MY-2X48JY-9PFT-2DVYT6
GJRE8H-4XPB-BGHC8H-4TX7-CHVFFM

IF they're all taken there are more available at http://diablo3guestpass.blogspot.com