You might try using an embedded single pixel image token within each post. Each time the image is called up, you should have a reference to the page/URI in question. Simply combining an existing solution (like ones commonly used to track ppc campaigns) with your blog posts might do the trick, but would not likely mesh with the WP admin interface.
As a side note: You’d might be able to create a plugin interface which loads the admin interface for the system within the WP Admin Panel/Dashboard by hard coding your login and password for the system into a simple php page.
