A new "QR Code" on McDonald's packaging will let you pull up the nutritional information on your camera phone. Right now, McDonald's QR codes are being rolled out in Japan.
From Calorie Lab:
Known as a QR Code, these printed codes look somewhat like a barcode and are scannable by many photo cellphones. All sorts of information can be packed into these little codes, from the website to find the amount of calories and fat in a Big Mac to a company's contact information on a business card.
Scanning the QR Code on any of 19 sandwiches, eight sides and five salads brings up a URL, which will take customers to the nutritional information for the food they are eating. Customers will be able to view the amount of calories in their meal, as well as the amount of sodium, fat, protein and carbs. Information is available both for individual items and meals. Customers can also find out about allergy information, though it might be a little too late by the time you've already purchased your meal.