Right now, Amazon is offering additional discounts when you preorder Quantum of Solace and other James Bond Blu-ray titles and apply coupon code QUANTUMS.  The discounts are as follows:

• Buy Quantum of Solace and 1 qualifying item at the regular price and receive $7 off.
• Buy Quantum of Solace and 2 qualifying items at the regular price and receive $10 off.
  
• Buy Quantum of Solace and 3 qualifying items at the regular price and receive $20 off.
• Buy Quantum of Solace and 4 qualifying items at the regular price and receive $25 off.
• Buy Quantum of Solace and 5 qualifying items at the regular price and receive $30 off.
• Buy Quantum of Solace and 6 qualifying items at the regular price and receive $40 off.
• Buy Quantum of Solace and 7 qualifying items at the regular price and receive $45 off.
• Buy Quantum of Solace and 8 qualifying items at the regular price and receive $55 off.
• Buy Quantum of Solace and at least 9 qualifying items at the regular price and receive $60 off.