http://www.excite.co.jp/News/bit/00091159746648.html

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http://itpro.nikkeibp.co.jp/article/COLUMN/20061003/249729/

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http://www.jp.playstation.com/scej/title/pkara/

http://www.yomiuri.co.jp/atmoney/yw/yw06101501.htm

http://digdug.seesaa.net/article/24844815.html