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I liked this idea, not sure why it didn't make the list. Soon after I sent this, saw they did something like it - had a basket comparison of carts full of items from different stores (I am not taking credit for anything they did, other than when I worked for them in China). Someone is doing something like this, but not sure it is a receipt scan. Muse and those guys had something a little like this with ShopSavvy. With standard product names and UPCs this would be easy. Really curious as to the product price variation across same stores in different neighborhoods. Just went to Walmart Neighborhood Market tonight, usually much cheaper than others, but many times at Kroger and Tom Thumb they'll have deals that are even better.