A memo by Hearst Newspapers president Steven Swartz says the corporation’s newspapers, apparently including the P-I, plan to start charging readers for some online content. The company-wide memo has been floating around the Internet a few days. But it was the Friday Wall Street Journal blog that drilled down on what exactly Hearst was planning. As Swartz writes: “Exactly how much paid content to hold back from our free sites will be a judgment call made daily by our management, whose mission should be to run the best free Web sites in our markets without compromising our ability to get a fair price from consumers for the expensive, unique reporting and writing that we produce each day.” The burning question: what in the P-I will you pay to read?