From http://maccentral.macworld.com/news/0208/01.amazon.php
On Monday we reported that Amazon.com was offering Mac OS 10.2 ("Jaguar") at a special price of US$79 as compared to Apple's retail price of $129. However, that offer has been pulled, at least temporarily.
"The demand exceeded our wildest expectations," Amazon.com spokesperson Ling Hong told MacCentral. "We're taking stock to see if we'll reinstate the offer, but we're not continuing the rebate at this time."
However, if you placed an order for Jaguar, don't panic. Hong said that Amazon.com would honor all orders placed by 7 pm (Pacific), Wednesday, July 31.