In a press release dated July 19^th, 2010, Amazon.com has announced that for the past three months, they have sold 143 Kindle books for every 100 Hardcover books they’ve sold.  Even better, in the past 30 days that number has increased to 180 Kindle books for every 100 Hardcover books.  And to think, it only took them 33 months to make this happen.