I've been reading a lot of buzz about The Grocery Game, a subscription-based website designed to help you match coupons to the lowest sale prices in your city. I have not tried it, mainly because I'm so pleased with another FREE site called Couponmom.com.
This Atlanta woman hit upon the "coupon database" idea first, developed the lists with programming from Georgia Tech students, and offers her lists without charge so that more of our freebies can go to charity.
If you're interested in saving money on groceries, stick around! Like Merchant Ships is full of meal planning strategies and resources, even if you don't feel like clipping.