Amazon.com apologized to clients for having to wait even six weeks to receive their ordered Kindle, the electronic reading device.

In the apologetic note found on their website, Amazon’s chief executive, Jeff Bezos, explained that the electronic device had sold out in a few hours after its launch, and that caused the shipping delays. He also said the company had improved its manufacturing capacity so that, when a client ordered a Kindle, Amazon would ship it in the same day.

“We hope to be able to announce you within the next few weeks that we’re back in stock and that when you order a Kindle, we’ll ship it to you that very same day. That’s our goal: order today and we ship today. Until then, customers can order now, and they’ll be the first in line.”

The company has denied several times to reveal how many Kindle units it has sold until now, and this has raised questions whether Amazon really had manufacturing problems or whether the company only wanted to give the impression of high demand, for advertising purposes.

However, despite its not-so good PDF compatibility, the black and white screen or the high price of $399, the product was well received. On the other hand, Amazon launched the device before Christmas, at the beginning of the shopping season. And that could also explain why Kindle sold out so fast.

The product was launched on the market in November, and Amazon also offered to “feed” it with more than 90,000 books, newspapers and blogs. With Kindle, the company tried to go beyond electronic books, so the device has built-in access to The New Oxford American Dictionary and to the world’s most exhaustive and up-to-date encyclopedia, Wikipedia.org, and its collection of over 2,000,000 articles.

Kindle is based on the high-resolution display technology called electronic paper, developed by E-Ink, which means that its sharp black and white screen that is as easy to read as printed paper. Th E-Ink technology impressed many users, who wrote good Kindle reviews on the Internet.

“First, anyone who thinks that a PDA or mobile phone with an LCD screen is "just as good" as a Kindle has never used a device with eInk technology. The Kindle's screen is very un-computer-like, and very much like reading paper. If you haven't seen one in person, you really can't comprehend how much easier on the eyes an eInk display is. It's effectively the difference between reading a laptop and reading a book... yes, it's that good” wrote one of the Kindle fans.