Several people have told me that their preorders were cancelled by Amazon. That's not because of delays in delivering the book, which is likely to come out at the end of June. Instead, it appears that Amazon put up two pages for Skating on Stilts and took preorders from both of them. I'd like to think that this was the result of a frenzy of interest in the book; a single page just didn't seem like enough.
Unfortunately, to cure the problem, Amazon seems to have simply deleted one page and cancelled all orders made from that page. Works for them, but not for those who ordered early.
If that happened to you, don't worry. You can simply pre-order from the right page . And, as compensation for the hassle, you'll save 11 cents over the price you would otherwise have paid.
UPDATE: I corrected this snakebitten link. Thanks, Frank.