There was a discount code of 25% on any tutorial that ended on July 8th unfortunately... I don't think there is a discount promotion currently running.
The 404 tutorial is really really good! Very good value for money IMHO - One of my fave's. You could try using the contact form [url]http://www.macprovideo.com/contact/[/url] to find out if you are able to add it as part of a bundle retrospectively?