Brad:
My boxed copy came Saturday via Priority Mail. I assume I don't need to enter the serial number from the box...
One small gripe...the box was a teeny bit squished by our friends at the Post Office. I would suggest that you use a double-size video box from USPS...they are free with Priority Mail postage and will protect the box more than a padded mailer (it's a cost savings for you, too). See http://shop.usps.com and choose Mailing/Shipping, Priority Mail.
They ship the boxes to you for free, too...