The tentative date I was given was a Wednesday. No word on venue yet (obviously won't the the NYIAS).
At the Meno Park unveiling, one of the Tesla staff told me they were going to maybe have the Model S on the Dave Letterman show near that date. I am guessing that maybe Elon or another Tesla spokesperson will be the guest, and if they can swing it, the car will be there to show off. What a great PR gig! Hope it comes off.