Actually I work for best buy and we had a HUGE customer escalation over this. We had sold a Macbook and our sales associate assured the customer the Leopard drop kit was in the box but it turns out it wasn't. We referred the customer to the Up to Date program as we had no more drop kits, and the customer did not want a new computer as his files were already on it. Unfortunately we did not know that computers purcahsed AFTER the release of Leopard will actually NOT qualify for the up to date program, you will realize this once you enter in your serial number, your computer will be rejected. We contacted Applecare regarding this and they told us that we were responsible for ensuring the drop kit was in the Macbook box and that the customer was NOT going to qualify for a 10 dollar upgrade disc from apple. We ended up having to give a retail copy of Leopard to our customer for free.
But, your macbook should come wit a drop kit in it, its unlikely that it would not include it but as i just mentioned it does happen, and in that case you will need to bitch at Best Buy to get your Leopard Disc, as you won't qualify for up to date with Apple.