I found this to be quite an interesting read that brings up alot of good ideas to think about.
http://sfgate.com/cgi-bin/article.cgi?file=/c/a/2002/07/28/IN244190.DTL&type=printable
http://sfgate.com/cgi-bin/article.cgi?file=/c/a/2002/07/28/IN244190.DTL&type=printable