It would be nice to be able to click a button to send My Shopping List to my local homebrew store. I could use it to email the shopping list that I have built up over time to my homebrew store where ideally they would package it up for me so it's ready for pickup. Anything that is not clear or out of stock or whatever, they could discuss with me when I get there. It would require the buy-in of my homebrew store clearly. But it might also be a way to get the homebrew stores on board with your product and have them recommend it to their customers.