The PiMinder is an Internet-enabled market minder using a Raspberry Pi. It has illuminated buttons for each of a set of common grocery items - Milk, Eggs, Bread, etc. In the home, push a button to light it up, indicating you need that item. Immediately, the PiMinder synchronizes with a Web Service, and a mobile site you access from your phone is updated, so the next time you're at the store you can grab what you need.
At the store, and pick up a needed item? Check it off on your list, and the item on the device is updated instantly.