I seriously doubt it. Demand for the iPhone is so great right now that Apple doesn’t really need to take any special measures to lower prices since they’re already selling enough of them. Making them cheaper (even for a day) just lowers their profit on each unit. That being said, double-check the Apple and ATT Wireless (sorry assuming you live in the US) websites on Thanksgiving evening just to make sure. You never know, they may actually surprise somebody…