Flipping is not sleazy. They spend just as much time logging in trying to buy the book as the next guy (which is all you are out) and then it is their's to do with as they please. Let go of some imagined scenario where a flipper is taking away your book - it is not stealing or dishonest or somehow unethical.
Best of luck to everyone on getting a copy, but any way it shakes out there are going to be some sad folks 5 seconds after this thing goes on sale.