I got an email from Amazon this morning saying that they were very sorry, but the release date for The Hidden Family paperback has been cancelled and so they have cancelled my pre-order and not charged me. They are still listing it as being released in May, so I suspect that the publishers are changing their schedules around. But this means when the new date is set I'm going to have to order it again. Bah.

Accelerando is still listed (and my order for it is still uncancelled) with publication date 1st June. The Atrocity Archives appears to already be unavailable through Amazon as new, though there are a couple of used copies available - it was only published on 3rd Jan! crazyscot and I spent some time yesterday evening trying to persuade emperor that he wanted to read it.