I just downloaded the application and it is very nice!, the best of 6 I've tried for shopping lists. Good Job!
I think it would be even better if I could share items among lists when I pick items.
I like to have:
A list called baby, for all my baby stuff
A list called household: for cleaning supplies, soap, toothpaste
Then a list per store:
Natural Store and I can pick baby, supplier or any other type of items
Grocery store and I can also pick from any items.
I gues they would be lists of items and lists for action
From a list for action I can pick items from any list of items.