Did you know Woot added the Cancel Button Back? Sort of...
Over on Woot Main, there is WootBot thread that says;
"Hey, we've been there. You get carried away with the clicking and the shopping and the next thing you know you're sitting there wondering why on Earth you just bought that thing. That's why we're now offering you the ability to easily cancel your Woot order before it ever even starts moving through our system.
There are limits: you've only got 15 minutes to do it, and it doesn't apply to orders with expedited shipping or orders of Woot-Off sales."
So, they added a cancel button, but it only works for 15 minutes, IF it's not a woot-off, expidited order, the 3rd Wednesday of your birth month, or a day ending in Y.