Here in Winston-Salem, they were overflowing with the 100GB drives... they had just put them out on the floor and the very top shelf was just overloaded. They had a ticket up that DID show the $40 off rebate, but it was one with absolutely no other info on the drive, as if it were only gonna be temporary (as said here already). I was told by one of the guys in the department that they have a thing like Circuit City where if you buy something and it goes on sale, just bring the receipt in within 14 days and they'll give you the difference.
This is what i'm planning on doing.