I decided to just let the order sit there instead of cancelling in the hopes that they would get more. I've been checking all week, and that "Backordered" status just sat there on the screen laughing at me.
Just checked an hour or so ago, and the status had changed to "Shipped"!!! I actually loaded the page and had closed it before it penetrated that something had changed. Had to go back and reopen the page to double check. There's a tracking number and everything! So, I guess my Dad's going to get a TouchPad after all!