Just checked my local Domios Pizza for voucher codes and came up with:

Deal: Pick-up - Traditional Pizzas from $8.95
Code: 72412
expires: 30/04/2013

Deal: Delivered/Pick-up - Value Range Pizzas from $12.95
Code: 33028
expires: 30/04/2013

Deal: Pick-up - 2 Traditional Pizzas, Garlic Bread, 1.25L Coke from $21.95
Code: 11254
expires: 30/04/2013

Deal: Delivered/Pick-up - Value Range Pizzas from $31.95
Code: 58508
expires: 30/04/2013

if you have any more Dominos pizza voucher codes for national deals or your local area please feel free to add them!