4) Apple has never intentionally shorted production to boost a products viability. Such ploys rarely work and reduces income -- which is Apple's goal. It wants to sell as many as it can. Teasing consumers does not make them a dime. It's a losing proposition.
Plus, Apple doesn't need to do more in building the buzz about the iPad. It's already there. Their past successes and current skyrocketing customer satisfaction give Apple and the iPad the buzz and public awareness that any company would love to have.