I like the idea of meal planning, but most applications don't work for me. Most meal planners I've come across are similar to this one. You randomly pick recipes and a grocery list gets generated for you.
I want to work the other way around. Each week we get sales flyers from our local grocery stores. We look to see what's available, and make our shopping list. Then we try to plan meals based on our list plus items we may already have.
Using this workflow, it would be nice if a menu planning tool could be given a list of ingredients, and then make suggestions for recipes.