The new Kindle line-up piggy-backs on a number of recent Amazon accomplishments. Amazon said over the past 12 months, customers spent more than $1 billion via mobile devices, including sales by Kindle. Yesterday, it was reported that the Kindle was sold-out, and Stieg Larsson, the author of “The Girl With The Dragon Tattoo,” became the first author to sell more than 1 million Kindle E-books.

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An unspecified “millions” of people have already purchased a Kindle, making it the No. 1 bestselling item on Amazon.com for two years running. But with improved technology, and a lower price point, Amazon’s CEO Jeff Bezos said he’s hoping that “many people are going to buy multiple units for the home and family.” Amazon’s new price points are nearing lows in the e-reader world. Last month, Barnes & Noble (NYSE: BKS) lowered the price of its 3G Nook to $199 and its WiFi version to $149. For comparison, a the lowest end iPad and iPod Touch cost $500 and $200, respectively.

The two devices are available for pre-order at www.amazon.com/kindle3G and www.amazon.com/kindleWi-Fi starting tomorrow when the announcement is officially made. It will be available to customers in more than 140 countries on August 27. (Press release via Engadget.)