Get Up to 10% Cashback at Amazon with PayPhrase.  Create your PayPhrase and place orders with the CashBack with PayPhrase buttons at checkout.  Earn 5% cashback when shopping with Amazon and up to 10% with other participating merchants.  The maximum amount of cashback per qualifying transaction is $50 and there is a maximum per person cap of $250.  The orders have to ship by 12/31 and the cashback reward to be claimed by 1/31, 2010.  Here is a screenshot for your reference.