Given debate about the proprietary code and linking done on the DM320 platform, I've done a considerable amount of research. http://www.rosenlaw.com/oslbook.htm and particuliarly http://www.rosenlaw.com/Rosen_Ch06.pdf and http://www.rosenlaw.com/Rosen_Ch12.pdf

Which also led me to http://en.wikipedia.org/wiki/Mozilla_Public_License and http://www.gnu.org/philosophy/netscape-npl.html and http://www.croftsoft.com/library/tutorials/gplmpl/ I'm sure there will be considerable discussion on this on the groups, see here