According to Amazon, Cyber Monday was the biggest day ever for Kindle sales worldwide. Without specifying numbers, Amazon says the top four spots on its worldwide best sellers list have been occupied by Kindle e-readers and Kindle Fires since their launch three months ago. Since its launch, the Kindle Fire HD has been the most gifted and most wished for product on Amazon worldwide, and nine out of the top 10 best-selling products on Amazon worldwide since June are Kindles, Kindle accessories, and digital content. [Source: Amazon]