Here's the best new Go Daddy promo codes. I just used OK9 today to pick up some new .com domains and it worked awesome.

OK7 - 10% Discount on any order
OK8 - 20% Off $50 or More
OK9 - 30% off Domain Renewals or New domain registration (.com)

**Special Godaddy Code Valid through 08/31/09.
Godaddy Promo Code OK25 25% off all hosting plans or any order of $91 or more.