The intended formatting in my previous post seems to have been garbled. Here are those last four sites again:

"Opposing Copyright Extension" http://www.public.asu.edu/~dkarjala

CCCC-IP: http://www.ncte.org/cccc/cccc-ip

Lutheran copyright page: http://www.elca.org/afp/house/copyrit.html

CNI copyright forum: http://www.cni.org/Hforums/cni-copyright