I know there is a very active thread already concerning this issue:
Gas Pedal Delay
However, I wanted to start this thread to track who has called Nissan to do something about it.
Nissan Consumer Affairs has been incredibly helpful thus far (though it's only been 2 days). They informed me that everybody who experiences this throttle delay needs to go to their dealer, then contact Consumer Affairs at: 1.800.NISSAN1
Please do not discuss the actual problem here, as that is what the other thread is for.