Will publishers kill Amazon's golden goose?

COMMENTARY: Amazon (AMNZ), which usually doesn't get too specific about details of its sales, apparently felt the need to crow about the Kindle. The company claims to have sold 1 million a week for the past three weeks. It's hot news, fueled in no small part by the Kindle Fire tablet. But while Amazon congratulates itself and tries to intimidate would-be competitors, publishers are potentially pouring cold water on the retailer's ardor. E-book prices are rising, according to a Wall Street Journal report. And that could come back to hurt Amazon, as well as Barnes & Noble (BKS), as