http://yui.mine.nu/linux/berry.html
http://itpro.nikkeibp.co.jp/free/ITPro/NEWS/20041101/152006/
http://japan.internet.com/linuxtoday/20041105/5.html
http://itpro.nikkeibp.co.jp/members/SI/ITARTICLE/20050706/164051/