最近对人民搜索的讨论比较多，对搜索引擎开源程序关注了一下。
http://www.dbanotes.net/web/nutch.html Nutch初体验
http://larbin.sourceforge.net/index-eng.html Multi-purpose web crawler
NUTCH
http://today.java.net/pub/a/today/2006/01/10/introduction-to-nutch-1.html
http://today.java.net/pub/a/today/2006/02/16/introduction-to-nutch-2.html
http://apache.etoak.com//nutch/
Luck
http://www.getopt.org/luke/
对Nuch的评价较好，先做个标记，以后研究研究。