What i've done is print out the shopping cart with the discount and went to pick it up at the store. You might want to do the same thing to be sure that you're getting it with the discount. BTW, there are also 3 FREE dvd's with the Toshiba....
Here is the fine print from the email OD sent:
Still have some last minute holiday gifts to buy? OfficeDepot.com has everything you need and more. And for a limited time, when you shop at OfficeDepot.com, you can save 20% on your order of $50 or more. Simply click here or on any of the other links in this email and the coupon will be automatically applied to your order. Your discount will appear when you complete and confirm your order. Be sure to begin shopping by clicking on any link in this email for the discount to be applied to your order. This special offer expires 12/31/01, so hurry before time runs out. Offer is valid for delivery-only orders placed online and is not valid in conjunction with other offers.
*Special offer is valid for one-time use on delivery-only orders placed online and is not valid in conjunction with other offers. Coupon is not valid on purchases made at Tech Depot by Office Depot. Offer excludes purchases of Business Solution Center services, Microsoft bCentral and Partner Services, Global Customized Chairs, Configure-To-Order Computers, or products purchased from the Office Depot Print Center, Office Depot Wireless Center, or the Office Depot Website Design Center.