Here are some of the newly released Go Daddy promo codes. I just used OK9 to buy some domains and it worked great.

OK7 - 10% Discount on any order
OK8 - 20% off $50 or more
OK9 - $7.49 Domain Registration and Renewals

**Special Godaddy Coupon Valid until August 31, 2009.
Go Daddy Promo Code OK25 25% Discount on all hosting plans or any order of $91 or more.