Lots of GoDaddy promo codes that end in 1, 2, or 3 have expired or are about to expire at the end of August 09. I am aware of this because they are issued via a specific relationship GoDaddy has with an online media company. But there are replacements for most of them. Here are the ones I have:

MTECH8 or EMMA7 for 10% off your order

MTECH9 or EMMA8 for 20% off $50 or more

MTECH10 or EMMA9 for 30% off com domains (and it works on renewals)

They don't expire till July 2010 and have no limitations on how much they can be used

Plus MTECH25 or EMMA25 for 25% off $100 or more, but these expire end of August 09, so use them quick!