A.A.
We've used it on and off for over 2 years now and I love it. Another web address for it is: http://www.mealtimemakeover.com. And no, I do not make any kickbacks off of that link. I actually have listened to Dave Ramsey, am following his plan, and have actually USED emealz. I wouldn't comment about this service unless I thought it was a good value.
I've had the best success with the Wal-Mart and Kroger plans. I really love how they spell out all of the prices and everything, so you always have a good idea of what the total will be. The Founder is a coupon fan, so her menus will often correspond with current coupons. I use Grocery Game too, so I can get the price down pretty low and ordinary mortals can as well.
For a *free* site that features low-cost menus, you might try Hillbilly Housewife and check out her $45 menu. http://www.hillbillyhousewife.com/40dollarmenu.htm There is also a $70 menu http://www.hillbillyhousewife.com/70dollarmenu.htm
She even has menus for Angel Food boxes. http://www.hillbillyhousewife.com/angelfood/
That site is currently free. Good luck! :)