From The New York Times’ Bits blog:
So the consensus is that Mr. McAdam will announce the iPhone on Verizon on Tuesday, and that the device will go on sale a few weeks after that. . . . [A]nother question is whether Apple executives will be on stage at the New York event. Don’t count on Steven P. Jobs, the company’s chief executive, to be there. Apple typically announces new iPhone carriers through press releases. Then again, Verizon is not any other carrier. So perhaps another Apple executive will make the trip.