http://arena.nikkeibp.co.jp/news/20050913/113459/
http://arena.nikkeibp.co.jp/tokushu/gen/20050902/113338/
http://www.itmedia.co.jp/enterprise/mobile/articles/0509/13/news108.html
http://internet.watch.impress.co.jp/cda/news/2005/09/14/9134.html
http://internet.watch.impress.co.jp/cda/news/2005/09/14/9132.html
http://www.asahi.com/digital/bcnnews/BCN200509140016.html
http://japan.cnet.com/special/story/0,2000050158,20086950,00.htm