Head over to FitStudio.com and register. This looks like a great site with all kinds of tools to help you reach your fitness goals!
When you register, enter promo code BALL. You will get an email welcoming you to FitStudio.com and it should also contain a coupon with a unique code for a FREE Stability Ball from Sears (value $12.99). Print your coupon and take it to your Sears store to redeem!
I just registered and got my email!