Think the iPhone 3G is hot? Check out the clip CBS 5 took of Apple HQ in Cupertino ! Firefighters this morning put out a three-alarm fire that burned for three hours last night in a building that houses Apple's finance and HR operations. No one was injured. The roof won't be the same, however. Senior communications dispatcher Rafael Salcedo told the AP the fire was "not very big, but there is going to be a lot of smoke damage." The San Jose Mercury News reported from the scene: " Some Apple employees stopped by to look at the scene and snap pictures on their I-phones." Question for the Merc's copy editors: What's an "I-phone"?