http://www.presentationzen.com/chapter6_spread.pdf links for 2009-05-19 http://feedproxy.google.com/~r/BetterCommunicationResults/~3/mVmajLv--wM/ 2009-05-19 http://www.leehopkins.com/blog/wp-content/plugins/podpress/images/powered_by_podpress_large.jpg