From The Wall Street Journal:

Amazon.com Inc., flexing its muscles as a major book retailer, notified publishers who print books on demand that they will have to use its on-demand printing facilities if they want their books directly sold on Amazon’s Web site.

The move signals that Amazon is intent on using its position as the premier online bookseller to strengthen its presence in other phases of bookselling and manufacturing. Amazon is one of the biggest booksellers in the U.S., with a market share publishing experts estimate to be about 15%. Amazon doesn’t comment on sales.

The news appeared first on Writers Weekly, an e-zine for freelance writers. They have accumulated a huge number of links to stories about the move in the press and on the net and are providing daily updates.