Just in from Kit and Amazon:
Holy cats! I never remotely expected anything like that — especially with the pre-release date getting screwed up, and the fact that we didn’t do a book bomb or anything. We’ve just begun posting a few memes with the book URL on them. And blog entries.
These Amazon rankings are ephemeral things. They have nothing to do with overall sales figures, only how many orders are being placed at a particular moment. We may be “#1” for five minutes, then never again.