Reports are that Black Friday sales of all Kindle tablets were up 400 percent over last year. iSuppli believes that Amazon will ship 3.9 million tablets by the end of 2011, giving it the second-place market share of nearly 14 percent behind Apple’s 66 percent share, greatly outpacing Samsung’s 4.8 percent market share.

“Our estimate is that Amazon.com has now sold 850,000 units direct from the Amazon.com site,” said Carter Nicholas, CEO of Datasource. “Total sales would be substantially larger. Amazon may have sold as many as 2 million or more so far when you consider all sales channels.”

Source: iSuppli.com