I got the following from another board. I have not tried it but my friend Stacy did. Sorry if it does not work for you.
add the flash drive to your cart.
On the next page, click "Proceed to cart and checkout"
On the next page, click the "Google Checkout $10 Off" image
Choose Budget Shipping and complete Google Checkout and the flash drive is free.You will have to enter credit card information before it zeros out the total. The $10 off with Google Checkout can only be used once. If you've already used it, this is not free. Shipping is free (7 - 9 business days).Buy.com - Kingston 1GB Data Traveler USB 2.0 Flash Drive - DTI/1GBKR