Central Mainframe Access will be redesigned by end of the week

*Access Code System will be redesigned to allow Users to get their Codes in game. :)
*Rewards are no longer going to be Daily, but Weekly instead. :(
*Zynga Support can no longer assist Users with retrieving them at this point in time. :(

Source : http://forums.zynga.com/showthread.php?t=557196