Amazon CEO Jeff Bezos told listeners of the company's fourth quarter earnings call that retailer was having trouble keeping up with the demand for the Kindle:

"The Kindle, in terms of demand, is outpacing our expectations," Bezos said. "It is also, on the manufacturing side, causing us to scramble. We’re working very hard to increase the number of units that we can build and supply per week, so that we can get back—our goal is to get into a situation as quickly as we can where when you order a Kindle, we ship it immediately... We are super-excited by the very strong demand."