For an hour or so earlier today Serious Stats was #1 in the amazon.co.uk sales rank for the category:
Books > Health, Family & Lifestyle > Psychology & Psychiatry > Methodology > Statistics
As of writing the rank has dropped to #3 (but I’m still quite excited – even though I know this may not imply large numbers of pre-orders).
They have also increased the discount on pre-orders to 36%. The book should also be available for pre-order in other countries (though I’ve only checked the US store), but for some reason the discount is not as generous there.
If you can’t get hold of the item in your country, bookdepository.com does free worldwide delivery (to most countries as far as I can tell). I’ve used them to ship gifts to friends and family overseas and they seem pretty reliable (and also offer pretty good discounts).