We e-mailed all of our preorder customers and told them to go back and check their shipping address, since FedEx can't ship to a PO box. Customers then came back to our Web site and confirmed their address.

This is the largest pre-order in e-commerce history on a single product. Our last largest one was at about 43,000 units. Now we're at six times that level.

We think it's a great investment to make in our customers. We figure that this is great for people who are current customers of Amazon.com and it will keep them happy with us. And we also think there's a lot of goodwill in terms of encouraging other people to come try out Amazon.com.

This has required a work-around change in our software.