http://www.forest.impress.co.jp/article/2007/08/10/sensyumozilla.html

http://gigazine.net/index.php?/news/20070811_gmail_purchase_storage/

http://www.tokyo-np.co.jp/s/article/2007081101000404.html

http://headlines.yahoo.co.jp/hl?a=20070812-00000010-mai-soci