Another holiday weekend, another 'best ever' notch for the Kindle sales post. As ever, Amazon's not giving any specific information about such claims, but the Kindle family is doing just fine, thank you very much, thanks in no small part to its two HDX tablet offerings and a revamped Paperwhite e-reader. The smaller HDX and the repackaged HD also managed to top the retail giant's sales chart over the weekend. If Amazon's looking to keep this party going into the future, it's bound to have some seriously busy drones on its hands.