Nintendo of America has announced that if you add funds to your Nintendo eShop account using a credit card or Nintendo pre-paid card by July 28th you will receive a promotional code. If you add $50-$99.99 you will receive a promotional code for $5, and if you add $100 or more you will receive a promotional code for $10. You will then get an email with your promotional code on August 2nd – just in time for the Pikmin 3 release on August 4th.

Thanks, Sheldon