PatentScope now includes licensing information for PCT applications. PCT applicants who wish to make their applications available for licensing may request so by filing the appropriate forms. (See the December 2011 PCT Newsletter.) As of March 19, only a handful of published applications have licensing information.
I'm the librarian for research services in the Engineering and Science Library at Queen's University in Kingston, Ontario. I've been working with patent information since 1991, including seven years at the U.S. Patent and Trademark Office. I believe that the dissemination of patent information is a public good and should be promoted, especially in the education of science and engineering students.