Did you look at the link I provided? Here's a quote from it:
"How your order will be processed
1. Your Upgrade order will be directed to the designated fulfillment site that corresponds with your shipment address.
2. Processing should occur by the estimated shipment date provided in the Order Confirmation e-mail.
3. You can track order status at any time on this website by navigating to the Track/Edit Your Order tab.
* To check order status, you will need the e-mail address you entered into your Shipping Details, and either your Order ID or the Microsoft Offer Form Code(s).
* Items that display on the Track/Edit Your Order page includes the Shipping Address of record, the Order Date, the order Status, an Item(s) summary, an estimated Shipment Date, the Carrier name, and Tracking Number/Link if provided by the carrier.
* An order shipment confirmation e-mail will also be sent and will include the same information as above.
* Note that the shipping date may vary depending on carrier and geography.
4. If your Upgrade media shipment is undeliverable for any reason, you will be notified by e-mail.
* All contact related to the Upgrade Program will normally be by e-mail; however, we may phone you if the e-mails are undeliverable.
5. When your Upgrade DVD(s) arrive, please verify the Windows 7 edition, language, and platform (32-bit or 64-bit) and ensure they match your original order."