2010-06-22 キンドルとNookが値下げ http://www.itmedia.co.jp/enterprise/articles/1006/22/news026.html http://jp.reuters.com/article/technologyNews/idJPJAPAN-15930020100622 http://www.nikkei.com/news/headline/article/g=96958A9C9381959CE0E0E2E29E8DE0E0E2E4E0E2E3E2E2E2E2E2E2E2 http://www.cnn.co.jp/business/AIC201006220012.html