netcat resources

http://youtu.be/W1XqcfRGPcg
http://youtu.be/lAEzwG4PKI0

http://youtu.be/tXBsey-6evo (http://pl4f0rd.blogspot.com/2011/01/netcat-basics.html)

Not well formatted but perhaps a good resource:
http://www.adamsinfo.com/netcat-tutorial-for-linux-windows-howto-nc/

http://www.g-loaded.eu/2006/11/06/netcat-a-couple-of-useful-examples/

http://www.infosecwriters.com/text_resources/pdf/Netcat_for_the_Masses_DDebeer.pdf