I have found these codes. Haven't used any so can't confirm that they work.
10% Discount off all Shoes at Amazon
SHOEXMAS or SUGSHOES or ASHOES10
Free Brain Training for the DS when you buy a DS Lite from Amazon
DSFREEBT
10% Discount when you purchase any Jewellery at Amazon
JEWELONE
10% Discount off Kitchen and Homeware including Le Creuset Denby Present Time Alessi Brita and Zap
JEITH8LE
20% Discount off over 700 Mother and Baby Products
BABYMB08
10% Discount on Kitchen and Homeware
JEITH8LE
£15 Discount on all personal care when you spend over £75
HAY5R9TS
£5 Discount off Kitchen and Dining at Amazon
T6UM557I