Michael Geist BLOGS about the Security and Prosperity Partnership (SPP) and the inevitable inclusion of PCT (Patent, copyright, Trademark, etc) law (See: MonteBello2007: Intellectual Property Action Strategy (PDF))
As I have written before, IP consistently ranks as a top U.S. trade priority and the SPP quite obviously represents a core part of the U.S. strategy to export tougher IP enforcement to its closest neighbours.
See also: The E-Commerce and Information and Communications Technologies Working Group.