It's here!

No, not the iPad. Something even more innovative and game-changing. Until now, we've been led to believe that a sandwich, by definition, is two slices of bread with some kind of filling in between. How foolish we've been!

Leave it to KFC to think outside the box and bring us the Double Down, the first fast-food sandwich to use slabs of fried chicken as buns.

Inside the "buns": Bacon and mayonnaise. Nutritionally, it clocks in at 540 calories, 32 grams of fat, and 1380 mg of sodium. How does it taste? The consensus, at least among discerning palates, is that it's an overly moist, overly salty mess.

Although it isn't health food by any stretch, it's also important to realize that the Double Down is nowhere near the worst the fast-food industry has offered. It's no worse, for example, than a Quarter Pounder with Cheese from McDonald's.