If you were waiting until today to take advantage of Radio Shack's deep, deep discount on an iPhone, you're most likely out of luck. The promotion caused a nationwide RS shortage of iPhone inventory, and AppleInsider contacted a number of the stores on Friday to find that all but one have run out of stock.
This isn't the first time "The Shack's" promos caused a run on the iPhone. The company offered a similar kickback program when the iPhone 4 was first launched. But
