Amazon on Wednesday unveiled the new Kindle DX, a larger version of its Kindle e-reader, during a press conference at Pace University. The Kindle DX’s screen measures 9.7 inches diagonally — the Kindle 2 measures just 6 inches. Amazon heads were accompanied at the event by executives from the device’s two major target markets — the newspaper and publishing industries. Newspapers and at least one university will be testing the distribution of content through the Kindle DX this fall. Priced at $489, the Kindle DX will be released this summer.