ok.. I must insist this is a stupid question that comes up a lot. Honestly we have no clue on inventory levels. Even apple have the up-to-date program run from October 1st to December... So even Apple will not be shipping new Macs with Leopard for a while.
But remember you can get it for $10 after the purchase. So then the question is do you buy the "$10 lottery ticket" and go for it and win or just pay later? How bad do you want you machine, and is the potential to pay $10 worth the wait?